Slayers/WMG

Slayers is really a writeup of someone's RPG.
Like Dungeons and Dragons or something similar. That's why Lina is so powerful- she's the character of someone with no life who spends all his time leveling her up. And because her 'adventures' are so entertaining, the DM (or equivalent) refuses to let her die.
 * Note This Troper wrote the theory above, and she apologizes as she doesn't really know much about RPG's, and if there is somehting inherintly wrong in the description, feel free to fix it.
 * The beginning theory is sound, though in a standard Tabletop RPG game everyone levels at about the same rate, Lina's player is just better at manipulating the system if you need a reason for her being more powerful.

Slayers is a tale about level 20 mages in a level 1 game
It's the impression i've had since day one "Slayers is what happens when a max level party does a nubie run." Lina can curb stomp anything short of a Raid Boss, Sabrinigo was a lvl 5 raidboss intended for a group of 20 1-5s but instead faced a 3 man team of lvl 20s.

Zomelgustar, the entity that Martina is worshiping, is becoming real
Though Martina freely admits that Zomelgustar is something she made up herself, the wild magic floating around the Slayers verse can easily center around her rabid faith. She's even Named it already, too; in a few generations, some sorcerer (or sorceress) will be running around casting spells drawn from ol' ZG.
 * You may be onto something: Martina once enchanted a magic dagger from "Her own stubborness", and she did manage to, erm, "summon" a lightning storm even though it took a really long time (Unless Xellos was just messing with them). Either way, this could also mean that Martina could be a low-level Reality Warper.
 * Given how "imbalanced" things have gotten in the Slayers universe; it's possible this is its way of trying to restore things. The essence of the Mazoku reform around Concepts; one of which Martina is helpfully providing.
 * Auntie Aqua of all entities used her crazy talisman once. This may mean "Zomelgustar" works as a wildcard: no proper spirit, dragon- or dark- Lord is specified, so any force that fits the user's current purpose may manifest, working as black, white or shamanistic magic depending on the force.

Having others (Lina) "kill" the pieces of Shabranigdu sealed inside humans is all part of Shabranigdu's Xanatos Gambit to free itself for good.
It's possible that "killing" the fragments of Shabranigdu,, thus freeing them from the reincarnation cycle, may very well be the only way for Shabranigdu to truly be free. Following this logic, if all the pieces are "killed", they'll merge back into one and become Shabranigdu reborn. Here's an analogy to make things clear: Shabranigdu : fragments ::. If any of them actuallly succeed and destroy the world, well that's why he wants to be free in the first place.

Slayers: NEXT Was A Gambit Roulette By Greater Beast
Slayers: NEXT seems to be a Xanatos Gambit by Hellmaster to kill Gaav and destroy the world, but Xelloss's bemusement at Hellmaster's destruction suggests something more. Hellmaster was actually manipulated by Greater Beast, into destroying Gaav and then himself.

Hellmaster came up with his little plan to manipulate Lina into destroying the world with the Giga Slave. For it to work, he needed Xelloss to protect Lina from Gaav's minions. Since Hellmaster was the strongest of the Five, Greater Beast had no choice but to comply, but she was tired of Hellmaster bullying her around all the time and decided to put an end to it. She gave Xelloss secret instructions to get Hellmaster's plan to backfire. When Mazenda sealed Lina's magic, Xelloss "just happened" to come across Lina. He really did it to give Lina the Demon Brand talismans and the Claire Bible manuscript about the Ragna Blade. Since Xelloss's main mission under Greater Beast was tracking down manuscripts, its not unreasonable to assume he knew where it was hidden.

In the fight against Gaav, Lina was supposed to use the Giga Slave, as nothing else could harm a high-ranking Mazoku; Hellmaster would then attack her from behind and disrupt it. But, thanks to Xelloss, Lina knew the Ragna Blade and used that instead. Hellmaster switched over to Plan B: finish off Gaav himself, then lure Lina into casting the Giga Slave against him. Xelloss feigned injury to ensure that Hellmaster would have to use himself as the bait for Lina, and thus be on the receiving end of the Giga Slave. (Note that Hellmaster claims Xelloss isn't around because he was too severly injured, but Xelloss pops up looking just fine the second Hellmaster dies).

The Giga Slave itself was the biggest variable in the situation, which is why this is a Gambit Roulette. While Xelloss couldn't do much about that, he was standing on the sidelines to manage the situation any way he could, such as retrieving the Sword of Light. And, in the end, it worked: two of Greater Beast's biggest rivals were eliminated at no cost to her.

This theory also works for the light novels, with a few changes. Xelloss forced Lina to fight Zanaffar rather than just doing it himself so that she'd develop the Ragna Blade. Xelloss did not give Lina the Demon Brand talismans so that she would feel more comfortable attempting the Giga Slave, as Hellmaster claims in novel 8; he did it so that Hellmaster would think that Lina could control the Giga Slave and that he'd have to attack her for it to go out of control. Since the Giga Slave went out of control on its own, Hellmaster inadvertantly attacked the Lord of Nightmares, royally pissing her off and sealing his fate.


 * Lord of Nightmares seems to be so powerful and indifferent she answers mortals' questions and grants wishes just because "why not?". Hellmaster hardly could annoy her much, but he was trying to use the higher being for his own purpose -- and it turned out this was only his goal, not LoN's. Then again, Xelloss did not only obviously set Hellmaster up to be squashed. He's using the world as his playground, not out to destroy it. But still acted to crush Gaav, not to join or use him, even when cut off Hellmaster in that desert pocket. Was he just cautious of The Big Boss's will all this time? And if he's still so loyal to his creator, didn't Zellas played the same game?

Zuuma was affected by the first casting of the Giga Slave
Zuuma's powers appear to be chaos based, just like the Ragna blade, but there's little explained about how they works. Likewise, Lina discussed the origins of the Giga Slave once during the series, mentioning laying to waste to a large area, but there was no details about this. Zuuma appears to be in constant pain due to his dark powers, so it stands to reason that perhaps the reason he wishes to destroy Lina is because of what she unknowingly did to him. I haven't read the novels mind you.

Naga is the one who set Lina up to meet Prince Phillionel
It's known that Naga is Prince Phillionel's eldest daughter, and at the start of the first season (before getting sidetracked by the whole Rezo/Shabranigdo thing) Lina was heading for Atlas City- the reason for which we found out at the start of episode 11; to meet a prince. Naga was never able to truly beat Lina, despite her claims otherwise, and was happy to claim even the smallest "victory" over the girl she considered her rival. Would setting Lina up to meet her dad, whom Naga knew would not match up to Lina's expectations of a prince, really be beneath her? It was probably the greatest "victory" against Lina that Naga ever achieved.

This would also explain why she stopped following Lina; she didn't want to meet her father again... in fact, it's possible that she's continued to avoid Lina in all subsequent seasons either because she believes the risk of meeting her little sister Amelia is too great (having heard from the stories about how Amelia joining up with Lina), or because she's afraid of what Lina will do to her in revenge.

Lina was completely obliterated at the end of Next.
So Lina is willingly drawn into the source of Chaos and the cold dark void, then when Gourry goes swimming she appears in front of him fine and dandy? It would be child's play for the mother of all things to create an exact copy of something, especially after having just absorbed it. The original Lina was unmade body and soul, the Lina running around is an exact duplicate created by the Lord of Nightmares.
 * Koan of the day: if she's an exact duplicate and the original is destroyed, does it matter?
 * Yes.
 * Three pounds of Flax.
 * To which I answer: Teleporters and Transporters. One of those things that makes me shiver at one real-world belief that states we cease to be at death, but are "remade" later - because that ain't us.
 * Obligatory Thief of Time reference: Everthing in the universe is constantly created and destroyed from second to second without us knowing. L-Sama could easily pull it off and Lina would still be Lina, no difference.
 * Alternately, Lina could have been rebuilt by the 'Chaos that always exists within' the LoN- her soul and memories would still be there, but she wouldn't be human anymore. Not truly.
 * So, she was "dissolved", then "crystallized" again and is a creation of LoN and not a regular part of the world anymore. This doesn't mean she isn't exactly the same in everything else, though. After all, The Golden Lord created worlds.

Sometime between TRY and Evolution, Zelgadis was knighted
Specifically, a knight of Seyruun. When Amelia and Zelgadis meet up with Lina and Gourry again in episode two of Revolution, Amelia explains why they were looking for Lina and Zelgadis chimes in. We then see a flashback of Zelgadis down on one knee, and Philionnel tapping him on one shoulder with a sword. There were people in the background, it looked like some sort of official ceremony. After all that Zelgadis has done for Seyruun in general and Amelia in particular, it only makes sense for Phil to make him a Knight of Seyruun.

Naga is Amelia's long-lost sister.
Although this has never been openly stated in the show's Canon, they've hinted at it repeatedly. Both Naga and Amelia claim to have sisters whom they haven't seen in years, and there are rare scenes in the various TV series where Amelia is seen doing an obvious Double Take at a random female passerby who resembles Naga... not to mention that Naga's hair is almost exactly the same shade of purplish-black as Amelia's. Of course, this will probably never be proven -- Amelia never appears outside the TV series and Naga has only been in the OAVs and theatrical features, so their paths never actually cross. One of series creator Hajime Kanzaka's fanzines does confirm this theory, giving Naga's real name as "Gracia Ul Naga Saillune". (This site and Wikipedia have more on this theory.)
 * Not really long lost, but she looks more like a runaway that couldn't stand her father and her little sister talking all that justice blabbering. Taking in consideration it's Slayers, it has to be the only comical enough possibility. She doesn't appear at the same time as Amelia because she hides from that boring justice and love speech.
 * Actually, the running away was supposedly prompted by witnessing her mother's death at the hands of an assassin, who Naga then killed with Razor Floss, if this troper recalls correctly. Which raises the possibility that Naga isn't exactly sane- the incident seems to be what gave her that intense phobia of blood she has.
 * If nothing else, the reason for that outfit is confirmed to be related... Because that was the last remaining outfit of Naga's mother. (Which has some HILARIOUS implications for Philionel...)
 * Played with massively in the new Evolution-R series, where both characters (likely) appeared. Naga doesn't show up, but an amnesiac talking suit of armor calling herself "Nama" shows up and joins the group. Since Nama has 1) the same seiyu as Naga, 2) the same mannerisms 3) the same annoying personality and 4) dear GOD the same laugh (at least in Japanese), it's almost certainly her. The amnesia+suit of armor business however means that neither sister is any the wiser, even when they share an episode together.

The tangerine Ozzel ate was Naga.
When Naga's soul was released from the living armor, she transmigrated into a box of tangerines. Latter, we are treated to a scene of Ozzel tasting a new batch of tangerines that the merchant "just picked up that day". Ozzel ate Naga.

Xellos is actually Lina's older sister Luna.
While absolutely absurd on the face of it, it becomes more plausible as one looks at the mounting evidence. Both have short, shoulder length hair that is dark purple almost to the tint of black. Both, apparently, have incredible magical power (Luna's is supposedly the power of Cephied as his destined knight, while Xellos's is the combined roles of priest and general of Beastmaster Zellas Metallum). Both are also well known for rarely (never, in Luna's case) having their eyes seen. Xellos has, in Next, shown the ability to pass as a woman and even act as one extremely convincingly. And in both NEXT and TRY, Lina is instrumental to accomplishing Xellos' goals. Given Lina's unusually high magical power and her tendency to save the world, she could actually be the Cephied Knight and Xellos has been assigned as her handler from day one, with "Luna" only existing to allow him to prepare her for what was to come personally without revealing himself. And the only time that Xellos and Luna would cross paths? In TRY, where Luna, supposedly a powerful force of good, turns Filia down on the quest and recommends Lina instead. Shortly thereafter, Xellos (who's capable of instantaneous teleportation) shows up on the scene to help Lina along. Filia, an inexperienced priestess to say the least, is unlikely to have seen through the deception.
 * This theory could, of course, go both ways; while the writing above implies that Xellos represents the true identity, it is just as plausible by the same evidence that Xellos is the fake identity (the only significant counter-evidence, "his" loyalty to Zelas is rarely if ever shown to the viewer and could be faked). This would have more unusual consequences (As Xellos is shown surviving things no human could, and is explicitly acting in Hellmaster Fibrizzo's interests during NEXT, which Luna would/could only do if she was perfectly sure Lina would win), but consistently fits with the same evidence.
 * Problem: Luna and Lina have documented births to documented parents, while Xellos has been alive since the War of the Monsters' Fall, proven by the fact that the surviving Gold Dragons know him on sight as the one who slaughtered them. Also, regarding the "Luna is good" part, she's not. She's an avatar of a force of good, but if she has an alignment it's Neutral Lazy.
 * This Troper was convinced that Xelloss was Sylphiel's big brother, until the whole, "oh, yeah, he's a millenia-old mazoku" thing.
 * The coup de grace for this particular WMG is the reasoning for why Luna turned down the role of saving the world; the prophecy explicitly stated that there would be a force that exists between light and darkness. Luna, while being more powerful, is a force for light. Likewise, Xellos is a force of darkness, and resonated with Fillia. If anything, Luna doesn't actually exist, and there is no knight for Ceipheed. We have documented proof of Xellos' mazoku powers, but there's not as much for Luna's light powers (that I've seen anyway).

Gourry is a Prince.
The Sword of Light, a unique magic weapon, is passed down through his family. He's extremely skilled with it, and shows more tactical awareness than someone Too Dumb to Live ought to. But when putting on an act, dumb is the easiest to keep consistent, and he often seems the stupidest when it would get him out of a beating. At the start of the episode Amelia first appears in, Lina tells Gourry she's going to ditch him and marry a rich prince rumors say will travel this very road we're traveling. He is not amused.
 * This may or may not be related to the theory Gourry is also an elf. One pre-series OAV has Lina timetraveling to meet a sword-wielding boy who shares Gourry's surname (Gabriev) who is friends with a blond elf. While this isn't particularly relevant to Gourry's character, it's noticeable that he's the only character whose ears we never see under his mop of hair.
 * Word of God apparently is that Rowdy Gabriev (the Gabriev from the first Slayers movie, the one referred to in the above note) did not marry Mellyroon (the elf girl), supposedly because she wouldn't have become old enough for romance until after Rowdy died. Personally, this feels a bit of an asspull... though this troper can't help but wonder if this theory actually strikes quite close to home and the author was simply working to misdirect fans from it...
 * Jus' sayin', you don't have to be married or "old enough for romance" to have babies.
 * And in this case age's such an impassable wall. If you remember the end of Perfect... when Rowdy knows and a first asked farmer in vicinity knows, what's the chance that a local elf doesn't know?
 * For those unaware of what the above point is making:

Lina's soul contains a fragment of the Mazoko Lord Shabranigdo.
This is why she can Beam Spam Dragon Slaves, sometimes without even using the Invocation words. This also helped strengthened her soul to be able to channel the Lord of Nightmares for a brief period.
 * In the light novels, Milgasia actually suggests that Lina might be carrying a piece of Shabrinigdo.
 * Xellos knows, of course, but that is a secret.
 * Nope. Lina is carrying a piece of the Lord of Nightmares inside her and has been since her first documented test of Giga Slave, or maybe since birth. Thus the event of possession at the end of Next and the odd resurrection of Valgaav at the end of Try.
 * The Lord of Nightmares does mention that 'My mind is my power, my power is my mind', which amounts to there being no way to separate her power from her (Rather than black magic, which is borrowing power from monsters, but the magic is not actively demonically intelligent) as Lina has some of the power of the Lord of Nightmares, as she can perform both the Ragna Blade and the Giga Slave, it follows that she possesses a portion of LoN inside her.
 * That just means using her power inherently attracts her very personal attention.
 * In the Evolution-R manga, the "ghost" of Rezo-Shabranigdu tries to possess her, but she snaps out of it when she sees glowing golden footprints, or as she later puts it "it sensed its master's scent on me, so I was off-limits." LoN has already staked her claim on Lina's soul, so nobody else is allowed to mess with it.
 * Technically, Lina didn't survived Next, she was destroyed and then re-created by The Golden Lord directly. This, and no one feels like acting against the will of LoN, once the lady cared to express it.
 * Also, Lina was a servant of LoN either way, even before becoming her creature. The form in which she refused the Pact boils down to "the chaos gives meaning to my existence, i value this over guaranteed survival". But whose province the chaos as such is? Isn't it the same as pledging one's life to the Golden Lord -- quite willingly and meaning this, not just formally in an incantation?..

Xellos is actually a meta character who either is or is working for the author.
In the final episode of Try, when Valgaav reveals his true intentions, Xellos' immediate reaction is one of shock: "No one is supposed to have that kind of thought!"

This from someone whom on multiple occasions we've seen calmly converse with people who want to destroy the world; someone who smiles as he wipes out an entire race of beings with a single gesture; someone for whom unconventional thought is practically a watch-word. And what makes him freak out in the end?

The idea that someone might upset the balance that defines the nature of the universe - in other words, the premise that directs the plot.

This completely explains his bizarre sense of humour and why it's so in-tune with our own (as opposed to some of the other mazoku we've seen), not to mention his propensity towards issuing spoiler warnings every time he's asked a direct question. Consider that all his most annoying (to Lina) habits are those that ultimately drive the story forward; how many times throughout the series does his supposed 'secretiveness' ultimately lead the group to discover important information they might otherwise have missed? Also, can his destruction of the Ancient Dragons still be considered genocide if all he really did was write them out of an early draft?

Oh, and that document he stole and then destroyed in his first appearance? The one that he said would "only disturb" Zelgadis if he read it?

Rezo/Zel fanfic.


 * Given the nature of the anime, this is actually more plausible than it might seem on the surface.
 * Wait, there actually is a Rezo/Zel fanfic? Who would write something like that? I think I need to lie down...
 * When you come back to your senses, watch Evolution-R, and pay close attention to the Zel flashbacks to his days as a crime-fighting Rezo devotee. Tell me there's no Ho Yay there. =)
 * Well, I guess it can be seen as subtext if you want to, but still, it's far too squicky for me ^_^;
 * If you subscribe to the theory that the Slayers characters represent the various aspects of Tabletop RPG players, Xellos is supposedly a GMPC.
 * Xellos is bound to act as a Game Master (in various senses) as a part of his near-symbiotic relationship with humans. Why slaughter people for Mazoku food if they milk themselves for it willingly every day? When they don't, he gives some vague hint that is taken as a challenge, feeds on ensuing frustration and bewilderment, satisfies his curiosity when humans finally find a way to reach it, and repeats later at will. And has a lot of fun in process. If he dangles achievable and valuable bait before his food source, this gives him voluntary "victims" who will follow the whole routine again and again knowingly. He's not above saving humans, if it's someone giving him well-tasting food or amusement. Of course he saved Martina: she's not only vengeful, but regularly brings hurt on herself in new and entertaining ways without any provocation.

Luna is just as scared of Lina as Lina is of her
Maybe even more.

Subscribing to the theory that Lina is carrying a fragment of the Lord of Nightmares around with her (or that L-sama is actively favouring her in someway or another) it basically means that despite being the Knight of the Ceipheid if push came to shove Luna would be totally outclassed. Ceipheid is powerful but is in no way a match for his mother which means in theory that Lina can call upon even greater power and Chaos magic is demonstrably more potent than normal magic already. As such Luna is just hoping that previous experiences will continue to leave Lina reluctant to confront her.
 * So the abuse of Lina when they were young was a calculated Batman Gambit on Luna's part to ensure that, if push ever did come to shove, Lina had a built-in Achilles' heel which Luna could use to paralyze (and then overcome) her sister?
 * Possibly, or she did it just to pretend to be corageous, and not a frightened sissy she might be. Because you know it would be funny.
 * Nah. Luna, as a symbol of purity and light, just reeeeeally doesn't like being seen naked.

Lina is the Lord of Nightmares' walking Spanner in The Works
Or to put it another way, Lina's as close as you can get to True Neutral as you can get in a world created by the living embodiment of Chaos.

Basically the L-sama created the Mazoku to try and destroy the world and the Shinozoku to try and preserve it, but she doesn't want either side to succeed completely. It's the dynamic created by the interaction between two equal and opposing forces that she's interested in.

To that end she created Lina whose very reason for existence is to make sure that neither side gets a permanent upper hand. What appears to be coincidence or bad luck for Lina in fact L-sama setting things in motion to keep things interesting.


 * Lina definitely was the Lord of Nightmares' champion even before Next, though unknowingly. And was nudged in the proper direction. Remember what prompted Zelgadis to help her? A nightmare, simple and rather heavy-handed. Following the Golden Lord's own words, Lina must have attracted her personal attention at least with the first summoning of her power (attempt to cast Giga Slave).

Rowdy Gabriev's messing around with chronomancy is why Gourry has memory problems

 * That... That actually makes sense! If we look at the theories about Gourry's lineage (the Elf girl) and take them at face value for a moment -- at the time of the movie, Gourry didn't exist. Maybe he wasn't supposed to exist -- ever! If that was the case, then Lina might not have ! The world may have been utterly destroyed! However when Lina went back in time and changed everything, Gourry came into being -- but becuse he wasn't supposed to exist, he has memory troubles. Did... Did any of that actually make sense?
 * No, if that was canon, this would be far more confusing than Neon Genesis Evangelion, and any ending becomes a Gainax Ending Up to Eleven.

The Lord of Nightmares is afraid of needles.
Basically, I imagine it like this: the reason why LON created gods and demons is that it is struggling between two evils. The worlds are actually wounds in LoN's flesh, and they hurt. The demons' job is to clean the wound. But the destruction of a world hurts like... like you'd imagine. So it created gods to hold off that pain.

It acted really cool when it killed Phibrizzo, but deep inside, it was terrified that this damned enfant terrible might finally drive the needle in.

The Slayers characters represent the various aspects of Tabletop RPG players
Specifically, these archtypes. Gourry is played by The Real Man, Zelgadis is played by the Real Roleplayer, Amelia is The Loonie, and Lina is (of course) the Munchkin. Xellos is by default the GMPC.

The Lord of Nightmares isn't actually in full control of her powers.
We all have those moments where we think, "Hey, wouldn't it be neat if..."

For most of us, it never goes beyond a brief fantasy. But the Lord of Nightmares is an omnipotent embodiment of chaos itself--an entity that blurs the lines between possibility and reality. When she does this, the things, people, ideas, and universes she imagines immediately pop into being--whether she wants them to or not. Long ago, this is how the four worlds of the Slayers universe came into being. This soon gave rise to a new dilemma, however--namely, that the newly created worlds were deeply flawed in many ways. Makes sense, really; the worlds were a spur-of-the-moment, half-formed idea that came into being before L-sama could even fully articulate the concept, much less put them through beta-testing. It was, of course, well within L-sama's power to destroy her the worlds and remake them properly this time, but there was already so much life--so much potential for new, unpredictable, interesting paths for it to take... Again, in most entities, this internal conflict would have been resolved one way or the other, and that would have been that. L-sama's capacity to create entirely by accident struck again, however. From her desire to destroy her defective creation were born the Mazoku, and from her desire to preserve it and see where things went from there were born the Shinzoku. And from there the history of the Slayers universe as we know it began...

In other words, whenever something strange, inexplicable, or illogical happens in Slayers canon, L-Sama Did It. This is, in fact, the ultimate source of all conflicts in the series.
 * Clearly, this means L-sama is Haruhi Suzumiya.
 * Thinking about it, it really would make sense. I mean, Slayers Universe is just that kind of crazy world that Haruhi dreams of. And she and Lina have few similiarities (both does whatever they want, breaks all rules that don't suit them, and are both very powerfull and completly unpredictable). Lina is just that kind of person that could pop out from Haruhi's mind. Yeah, I know it's a runnig joke to say that some world was created by Haruhi, but here it really fist like nowhere else.
 * This is actually really true in part: According to Word of God, L-Sama created the universes by accident, and would like to reabsorb them as she feels incomplete, but she can't do that on her own for some reason.

Rezo is in love with Lina
In Evolution-R he says how wonderful it is to be able to see... while looking right at Lina. Hmmm.
 * He could be just saying she's attractive. That doesn't neccesarily mean infatuation.

The only reason that Lina feels that her chest is "too small" is...
...Because people in her hometown were constantly comparing her to her sister. ("It's too bad you're not as pretty as your sister", "It's too bad you're not as cool as your sister" etc.), and they even compared their bust sizes. If the screen shot of Luna from the opening of TRY is, then it is possible that Lina feels her chest is "too small" because she was always compared to her sister. Traveling with Naga afer she left home could not have helped. Granted, Luna's chest is not *that* much larger than Lina's appears to be, however Lina's chest was probably a lot smaller when she was younger, while Luna's chest was larger as she was older.
 * Actually, if you compare Lina in Slayers Perfect with Slayers Evolution-R, she used to be a lot bigger, though that might just be Art Evolution.

Amelia represents America.
Amelia's name in Japanese is pronounced "Ameria," just one letter away from the country she supposedly parodies. Her outfit is a pastel version of its flag colors: red, white, and blue. She's headstrong about taking care of bad guys and bringing justice wherever she goes. She's also a hero fanatic and sees herself as one.
 * ...in the most oblivious and loud way possible and generic superhero style. Heh. Even if she wasn't intended as this initially, the Stealth Pun was too hard to resist.

Lina, Amelia, Zel, and Goury Represent the four temperments

 * Lina is choleric, Zel melancholic, Amelia is phlegmatic, and Gourry is sanguine!Setting and universe

Orphen takes place on another continent on the same world.
Orphen and Slayers are of the same genre, have similar technology(ie, same time), are from the same magazine(Dragon Magazine) and have a crossover that doesn't seem to contradict this theory.

Mazoku Are Driven Mad If They Feel Positive Emotions
Mazoku are beings of pure evil and darkness. They are they very embodiment of negative energy, and thus can feel nothing else. The reason they want to destroy the world is that, to them, all existence is nothing but suffering and pain. There are, however, ways that a Mazoku can become capable of feeling positive emotions: if they merge with a Shinzoku (pure positive energy) or a human (contain positive and negative). Because Evil Cannot Comprehend Good, when a Mazoku experiences positive emotion for the first time, it will Go Mad From the Revelation. There are at least four examples that support this theory:
 * When Chaos Dragon Gaav was merged with a human soul by Aqualord Ragradia (the Water Dragon King), it caused him to turn against the other Mazoku.
 * When Dark Star Dugradigdu merged with Night Dragon Volfeed, he turned into a mindless force of destruction that destroyed his own followers.
 * When Huraker the Priest gained Airlord Vaalwin's power (in the manga Knight of Aqualord), she went Ax Crazy and changed her strategy from Xanatos Speed Chess to Attack Attack Attack.
 * When Luke-Shabranigdu faced Lina in novel 15, he let himself be destroyed because he desired his own death above all else.
 * Not to mention Xelloss' general reaction to Amelia's speeches about justice.
 * Don't some humans react the same way?
 * May be canon -- and known to the Mazoku. Xellos explicitly states that Mazoku who are ressurrected in a non-standard fashion invariably become an enemy of the Mazoku - in this case, he was speaking about Gaav, Valgaav, and, in the immediate sense, Ghost Shabernigdu.

White magic is Holy magic that calls upon power from Volfeed and/or the gods of the blue and white worlds.
Lina's talismans worked while the barrier was still up. Therefore, it didn't isolate the people inside from the other three world's like it isolated them from the outside world. Since its possible to call upon the Dark Lord's of the other worlds from inside the barrier it is also possible to call upon there gods.

If Slayers and Lost Universe are connected, then the other two worlds that exist ALSO represent two other genres of Speculative Fiction.
And the clue on the genres is the names of the four Mazoku Lords: Ruby Eye, Dark Star, Death Fog, and Chaotic Blue.
 * Slayers is a Fantasy series and its Mazoku Lord is Ruby Eye Shabranigdu. It is the Red World. It's symbol is a magical eye.
 * Lost Universe is a Science Fiction series and its Mazoku Lord is Dark Star Dugradigdu. It is the Black "World." It's symbol is a shooting star.
 * The White World's Mazoku Lord is Death Fog and has the symbol of a field of screaming vapors coming out of what could be called graves. The White World is obviously Horror.
 * Given the similarities in the personalities of the main characters, that world's counterpart of Lina might be Ghost Sweeper Mikami.
 * Or the White World could be Ravenloft, and Death Fog is what the Dark Powers really are.
 * The Blue World's Mazoku Lord is Chaotic Blue and has the symbol of clouds and random symbols. I... got nothing.
 * Romance? I know it is not Speculative Fiction, but it is all I could think of.
 * My guess is hardboiled detective fiction, or cyberpunk.
 * Ah, yes. Mystery sounds good.

Slayers and Final Fantasy VII take place in the same universe.
But with a few thousands of years of difference, Slayers taking place before Final Fantasy VII. Magic without Materia? Check. Also, LON might actually be Minerva and Jenova is a Mazoku.


 * Which means that the Northern Crater was actually caused by Lina using the Dragon (or Giga) Slave.

Ideon, Mobile Suit Gundam, Lost Universe, and Neon Genesis Evangelion are all set in the same universe.
Namely, that of Night Dragon Volfeed. When Volfeed and Dugradigdu first merged, the result was Ide. Volfeed tried to guide Ide as much as she could, but in the end she lost out to Dugradigdu's destructive tendencies. The world was almost completely destroyed, but Volfeed was able to salvage the last remaining bits of it and allow life to begin anew. The lives lost in Ide's rampage would reincarnate in different forms and find Ide again, setting into motion the cycle of destruction and creation. Kane, Cosmo, Judau, and Asuka were all reincarnations of the same soul. Therefore, during Instrumentality, Asuka was released from the LCL even though she had been consumed by the mass produced Evas before Instrumentality occured. Volfeed just had a soft spot for Kane's soul. Because Ide stopped at Instrumentality during its latest rampage, the surviving gods were finally able to mount a resistance, heading into a different world to destroy Dugradigdu's weapons.

Slayers is set in the Warhammer 40000 universes
The Lord of Nightmares is a rogue Chaos God, and is experimenting with a Feral world. The Monsters and "gods" are her Daemons.