Shuriken School/Characters

Eizan Kaburagi

 * Adorkable: Very much so.
 * Dork Knight
 * Badass Adorable: He's an adorable, kind-hearted kid who you shouldn't mess with.
 * Beware the Nice Ones: He's a kind if clumsy kid, but piss him off and he'll show his impressive ninja skills. Naginata is the frequent target of these.
 * Butt Monkey: Especially in "Eizan’s Shadow" and "Class Photo". Also counts as an Iron Butt Monkey.
 * Comic Trio: With Okuni and Jimmy B.
 * Cute Clumsy Guy
 * Delinquent Hair: He's far from a delinquent, though.
 * The Heart: He’s the one who keeps Okuni and Jimmy’s quarrels in check. He’s rarely successful at this, but he tries. He's also this towards the Shuriken students in general.
 * Heterosexual Life Partners: With Jimmy.
 * Kid Hero
 * The Klutz: Very. This is even the reason why he doesn't wan't to do the school play in "Phantom of the Kabuki".
 * Luminescent Blush: When he’s around Okuni.
 * Nice Guy
 * Red Oni, Blue Oni: He's the Blue Oni to both Okuni and Jimmy's Red.
 * Salt and Pepper: The Salt to Jimmy's Pepper.
 * Shrinking Violet: Can be quite shy and introverted sometimes.
 * Silent Snarker
 * Twice Shy: With Okuni.
 * Weapon of Choice: His green ruler.

Okuni Dohan

 * Action Girl
 * Badass Bookworm
 * Cannot Spit It Out: She really has trouble coming to terms with her feelings towards Eizan.
 * Celibate Heroine: The very thought of being in love is her Berserk Button, due to believing that Love Is a Weakness. It's subverted though, since she has feelings for Eizan.
 * Cry Cute
 * Farmer's Daughter: She comes from a small village.
 * Hair-Trigger Temper: Hell yes.
 * He Is Not My Boyfriend: Regarding Eizan.
 * Luminescent Blush: When around Eizan.
 * Only Sane Woman
 * She Cleans Up Nicely: Her kimono ensemble in "The Big Illusion" caused many of her male peers to become enamored with her. Those include Choki, Nobunaga, Daisuke, and even one of the Kimura Twins. Eizan even said she looked beautiful.
 * Surrounded by Idiots: Generally, but most prominent in "Eizan’s Shadow".
 * The Smart Girl
 * Tomboyish Sidetails
 * Tsundere: Undoubtedly the Harsh Type.
 * Vitriolic Best Buds: With Jimmy and Ami.

Jimmy B.

 * Black Best Friend
 * Blood Knight: He just loves getting into fights.
 * Book Dumb: He's not into books or anything academic, but he's Street Smart and is very competent as a ninja.
 * Brilliant but Lazy: He has the potential to become a full-blown ninja, but is too lazy and laid-back to work into it.
 * Cool Big Bro: Acts like this towards Eizan, with varying degrees of success.
 * The Gadfly
 * Heterosexual Life Partners: With Eizan.
 * Innocently Insensitive: Sometimes, best shown in "Phantom of the Kabuki".
 * Jerk with a Heart of Gold: He's impulsive, hot-headed and likes to break rules, but he cares a lot about his friends and always ends up doing what's right.
 * Jive Turkey
 * Narcissist: Not as much as Daisuke, but can be quite vain.
 * Salt and Pepper: The Pepper to Eizan's Salt.
 * Shipper on Deck: He ships his friends Eizan and Okuni, and teases them about that.
 * The Slacker
 * Token Black: The only black student of Shuriken.
 * Vitriolic Best Buds: With Okuni. They’re practically brother and sister. He also has this with Daisuke and sometimes Eizan.

Ami Saeki

 * Action Girl: Less than Okuni and Kita, but still qualifies.
 * Genki Girl
 * Hair of Gold: For the most part.
 * Heterosexual Life Partners: With Okuni.
 * Joshikousei
 * Lovable Alpha Bitch: Bordering on Spoiled Sweet.
 * Miss Fanservice: A kid-friendly version.
 * Rich Bitch: Averted. While she can be quite bratty, she rarely (if ever) uses her money against her companions. Quite the contrary, actually.
 * Sailor Fuku
 * Shipper on Deck: Like Jimmy, she ships Eizan/Okuni.
 * Spoiled Brat/Spoiled Sweet: A mix of the two.
 * Tomboy and Girly Girl: The girly girl to Okuni’s tomboy.
 * Tsundere: Type B. She’s normally very sweet, unless she gets pissed off. Or you’re Daisuke.
 * Vitriolic Best Buds: With Okuni. One day they have a Cat Fight, and another day they’re hanging out and talking about "girly" things.

Daisuke Togakame

 * All Love Is Unrequited
 * Casanova Wannabe: He thinks he’s a pro at flirting, whereas he's actually a Stalker with a Crush.
 * Crazy Jealous Guy
 * The Friend Nobody Likes: He's frequently the least liked of the group, due to his general attitude.
 * Handsome Lech
 * Hopeless Suitor: To Ami.
 * Jerk with a Heart of Gold: He’s an arrogant coward, but he isn't a bad person. He can be brave whenever things are tough, and his feelings for Ami are shown to be genuine rather than just an obsessive crush.
 * Ladykiller in Love: Although the "ladykiller" part is debatable.
 * Lovable Coward
 * Love Hurts: Best shown in "An XXL Lie" and "The Old Master".
 * Narcissist: He’s concerned about his appearance (especially his hair) more than anything else.
 * Small Name, Big Ego
 * Vitriolic Best Buds: Has this with Jimmy.

Nobunaga

 * Badass Adorable
 * Beware the Nice Ones: He’s a very kind and sweet guy, but he isn’t someone to trifle with.
 * Big Eater: He’s almost always seen eating.
 * Butt Monkey
 * The Cutie: He's a very sweet, lovable oaf who inspires tenderness around him. His classmates also adore and respect him very much.
 * Fat Idiot: A benevolent version, although he's not so much of an idiot as being just slow-witted.
 * Gentle Giant
 * Ironic Name: He's named after the famous brutal warlord Oda Nobunaga. As seen in this page, he isn't anything like that.
 * Kindhearted Simpleton: He may not be the sharpest on the bunch, but he’s definitely a sweetheart.
 * Nice Guy
 * Stout Strength: He’s a sumo wrestler, what do you expect?
 * Mighty Glacier

Marcos Gonzalez

 * The Comically Serious: He’s a Large Ham with a straight face.
 * Conspiracy Theorist
 * Cool Shades
 * Dark and Troubled Past
 * Funny Foreigner: He's latin-american.
 * Large Ham
 * Runaway Hideaway: The reason why he went to Shuriken. He’s running because a strange group, "Los Tres Santos", are pursuing him for unexplained reasons..
 * The Stoic: He has the appearance of one. Then comes his Large Ham tendencies, and the stoicism goes out of the window.

Jacques Morimura

 * Adorkable
 * Cloudcuckoolander
 * Cute Clumsy Guy
 * French Jerk: Subverted. He’s French, sure, but he’s actually pretty nice.
 * Funny Foreigner
 * Genius Ditz: He’s a ditz most of the time, but no one can beat him in subaquatic combat.
 * New Transfer Student: He’s a foreign student from France. He thought Shuriken was a diving school due to similar uniforms.
 * Nice Guy
 * Reed Snorkel

Choki

 * Beware the Quiet Ones: Indeed. Jimmy even lampshades it.
 * Brilliant but Lazy: He's too busy sleeping to actually put his powers into practice.
 * Eyes Always Shut
 * Hidden Depths: He turns out to be quite the trickster in "Okuni for President",.
 * Mind Over Matter: He has telekinetic powers.
 * Power Floats: He prefers floating over walking.
 * The Quiet One
 * Sleepyhead: He’s usually found sleeping.
 * Warrior Monk
 * Wise Beyond His Years: Justified (somewhat), since he’s a monk.

Pork

 * All Drummers Are Animals: He’s the only one who uses a drum. Or any other instrument, really.
 * Cry Cute: In "Phantom of the Kabuki", shedding Tears of Remorse.
 * Cute Mute
 * Driven by Envy: The reason why he's the antagonist in "Phantom of the Kabuki". He wanted to play Eizan's character, and was resentful at him. He gets over it.
 * Petting Zoo People
 * The Slacker: Alongside Jimmy.
 * Team Pet
 * Villain Ball: In "Phantom of the Kabuki". It doesn't last, obviously.
 * The Voiceless: Compared to everyone else.

Tetsuo Matsura and Yota Sugimura

 * The Bully: Tetsuo, with Yota as his Bumbling Sidekick.
 * Jerkass: Tetsuo, to a T.
 * Satellite Character: Yota has no personality besides being Tetsuo's sidekick.
 * Smug Snakes
 * Those Two Guys: Also count as Those Two Bad Guys, considering their antagonistic roles.
 * Token Evil Teammates: Of Shuriken.

Vladimir Keitawa

 * The Ace
 * Adorkable: When dealing with women.
 * Badass Teacher
 * The Comically Serious
 * The Grotesque: Especially when he yells.
 * Jerk with a Heart of Gold
 * Mother Russia Makes You Strong
 * Sadist Teacher: At worst.
 * Sergeant Rock: Bordering on Drill Sergeant Nasty sometimes.
 * Team Dad: Shares this role with Kubo.
 * Why Did It Have to Be Tests?: He has a crippling case of test panic, which he had to overcome if he wanted to stay in Shuriken.

Kubo Utamaro

 * Apathetic Teacher
 * Beware the Quiet Ones
 * Cannot Spit It Out: His feelings towards Kita-sensei.
 * The Eeyore
 * Extreme Doormat: Unless he's pushed enough.
 * The Stoic: No matter what mood he's in, he'll always talk in the same tone of voice and a straight face.
 * Not So Stoic: That said, he can be excited or frustrated, which is treated as a big deal. Kita-sensei also breaks his stoicism.
 * Sugar and Ice Personality: He’s normally stoic and apathetic, but he becomes nicer and even sweet when Kita-sensei is around.
 * Team Dad: Alongside Vlad.

Kita Shunai

 * Action Girl
 * Badass Teacher
 * Hair-Trigger Temper
 * Lady of War
 * Nice Girl: Hair-Trigger Temper aside, she's normally a kind and pleasant young woman.
 * Oblivious to Love: She’s completely unaware of Kubo's affection for her.
 * Stern Teacher: Unlike Vlad-sensei, she believes in fairness despite her arduous trainings.
 * Team Mom
 * Tsundere: An unsorted example. She has an overall temper and is quick to get pissed, but is also kind, responsible and nurturing at the same time, switching moods according to the situation.
 * Walking Armory: She’s skilled in using every weapon.

Shuriken’s Principal

 * A Father to His Men: A variant. He's Shuriken School's principal, and he definitely cares for his students and the other teachers, considering the entire school family. He's perfectly willing to throw opportunities to gain money (not without pain) all for their sake.
 * Badass Grandpa: He's aged, sure, but he can and will kick ass if pushed.
 * Big Good
 * Crouching Moron, Hidden Badass: He’s a goofball who is mostly concerned about money, but there’s a reason why he's the principal.
 * Expy: Of Mr. Krabs. However, unlike him (or the flanderized one at least), he cares a lot for his students and the school staff, and he will put them above anything else.
 * Genre Savvy
 * Money Fetish: Justified to an extent, since he normally needs the money to maintain the school, although he seems to have a fixation with money in general.
 * Mr. Vice Guy: He's very obsessed with money, but he still has his heart and moral compass in the right place.
 * The Napoleon: Downplayed. He's short and can be quite mood-swinging, but he's nowhere near as unpleasant as other examples.

Zumichito

 * Almighty Janitor: See this seemingly meek groundskeeper? He's a former Shuriken student, and prepare to get your ass kicked if you piss him off.
 * Badass Grandpa: Indeed. He was a former Shuriken student, after all.
 * Beware the Nice Ones
 * Cool Old Guy
 * The Obi-Wan: He usually has this role.
 * Retired Badass

Michiyo aka Mrs. Clean

 * Almighty Janitor: A literal example.
 * Berserk Button: Never, EVER, mess with her cleaning.
 * Cool Old Lady
 * Never Mess with Granny
 * Super-Powered Evil Side: She literally transforms into a demon when pissed off.

Naginata

 * Arch Enemy: He's pretty much Eizan's.
 * Black Magic: His character bio states that he's highly skilled at the dark arts, although this is more of an Informed Ability than anything else.
 * Dragon-in-Chief/Dragon with an Agenda: While he's Katana's Principal's loyal subordinate, he's the one who directly antagonizes the Shurikens. Besides, hes an antagonist whether he works with him or not.
 * Faux Affably Evil
 * For the Evulz: The reason why he does anything, really.
 * The Heavy
 * Jerkass: No shit.
 * Loners Are Freaks
 * Sleeves Are for Wimps
 * Smug Snake: He’s arrogant and smug to a fault, which bites him in the ass more than once.
 * They Call Him "Sword"
 * Troll: Pissing people off is his raison d'être.
 * Undying Loyalty: To Katana's principal.

Bruce Chang

 * Arch Enemy: To Jimmy.
 * Blood Knight: Bordering on Axe Crazy.
 * Character Tic: Bruce can be spotted hunched over and grinding his teeth in anticipation of the fight in "Kubo's Secret".
 * The Dragon: To Naginata.
 * Evil Counterpart: To Jimmy.
 * Jerk Jock/Dumb Jock
 * Not So Different: As he's Jimmy's Evil Counterpart, Bruce is more reckless and mischievous than his teammates; but unlike him, his intentions are not so harmless.
 * Pet the Dog: He sleeps with a teddy bear, according with "Super Ninja". See also Undying Loyalty
 * Smug Snake: Even moreso than Naginata. If someone puts Katana into trouble, chances it's going to be him.
 * Undying Loyalty: He sticks with Naginata, no matter what happens.

The Kimura Twins

 * Arch Enemy: To Okuni.
 * Even Evil Has Loved Ones: As jerkish as they are, they do care about each other, despite their Sibling Rivalry. See Living Emotional Crutch.
 * Finishing Each Other's Sentences
 * Living Emotional Crutch: They become extremely weak when separated, and are stated to be dependent on one another.
 * Pet the Dog: They are visibly moved to tears by Pig's violin-playing, as seen in "The Big Illusion".
 * Single-Minded Twins: To the point where their first names are never mentioned.
 * Smug Snakes
 * Sneaky Guys
 * Trickster Twins: Very much so.
 * Undying Loyalty: To each other and Naginata.
 * Villainous Crush: Hinted to have this for their arch-rival Okuni.
 * Vitriolic Twins

Doku

 * The Brute
 * Even Bad Men Love Their Mamas: According to his bio, his mom still brings him lunch every day.
 * The Quiet One: He rarely speaks.
 * Satellite Character

Katana's Principal

 * Arch Enemy: He's one to Shuriken's principal, as well as his Foil.
 * Big Bad: Or so he’s supposed to be.
 * The Dreaded: Everyone seems to fear him, even his own students (save Naginata).
 * Drill Sergeant Nasty: To the Katana students. Unlike Vlad, his methods of punishment are more abusive than comedic.
 * Even Evil Has Loved Ones: See Pet the Dog.
 * Glowing Eyes of Doom
 * Hair-Trigger Temper: He has such a temper he scares the hell out of the Katana students (sans Naginata).
 * Knight of Cerebus: Averted. Despite his scary appearance, he's just as propense to comedy as the other characters, and his appearances doesn't darken the story in any way.
 * Non-Action Big Bad: To the point that, if not for being shown and his cruel personality, he would be a Designated Villain.
 * Pet the Dog: He truly does care for his pet baby chick, and is about the only living being he doesn't treat like shit.
 * The Man Behind The Man: To Naginata.

Kazumi

 * Big Bad: In “Eizan’s Shadow”.
 * Bratty Half-Pint
 * Evil Redhead: Oh, yes. Combined with Fiery Redhead.
 * Hate Sink: He's rude, loud, bratty, annoying, and only exists to cause problems to Shuriken. In-Universe, he's so despised the teachers threatened the principal to quit if he entered the school, and not even Katana School can stand him.
 * Jerkass
 * Karma Houdini: He constantly gets away with his awful behavior in the episode he's in. Played with, however, in that being him is actually a punishment for itself, and him leaving is such a victory for everyone that it barely matters if he gets any comeuppance or not.
 * Motor Mouth: Holy shit.
 * One-Shot Character
 * The Napoleon

Torrence

 * Alpha Bitch: At first. She gets better.
 * All Guys Want Cheerleaders
 * Blondes Are Evil: Not evil, but kind of a bitch, and she mellows out.
 * Genki Girl: Moreso than Ami.
 * Valley Girl

Missy and Casey

 * All Guys Want Cheerleaders
 * Fiery Redheads: They mellow out.
 * Girl Posse: They’re Torrence's.
 * Single-Minded Twins