3×3 Eyes/Characters

Pai/Parvati

 * Arranged Marriage: First to Shiva  and later to Koko.
 * Badass Adorable
 * Big Eater: As Pai.
 * Brainwashed and Crazy: Kaiyanwang has this effect on her (and every other Sanjiyan, apparently) until she learns to fight it off with The Power of Love.
 * Cloudcuckoolander: As Pai. Her idea of cooking involves magic...and an Eldritch Abomination.
 * Cute Monster Girl: Sometimes, it's easy to forget she's not human.
 * Eyes Always Shut: When her third eye is closed, Pai is in control. When it opens, Parvati takes over.
 * Everyone Calls Him "Barkeep": Most times Parvati is simply called Sanjiyan or Seima (Holy Demon), even by people that know her name.
 * Friend to All Living Things: Pai. Parvati... less so.
 * Genki Girl: As Pai
 * Green-Eyed Monster: Not happy with Yakumo and  sorta-not-really relationship.
 * Jerkass With a Heart of Gold: As Parvati. She never really stray far into Jerkass territory, but she can be pretty mean.
 * Love Triangle: At the end of the first series.
 * Not So Above It All: Parvati takes a liking to adult night life (booze, karaoke, bars) after spending some time as Himeji Ryoko.
 * Not So Stoic: Parvati after the Lotus Eater Machine arc. Yakumo had to
 * Pinocchio Syndrome
 * Really 700 Years Old: Well, about 300 or so, and she looks about 16, like Yakumo.
 * Soul Jar: To Yakumo's soul.
 * Tsundere: As Parvati.
 * Walking the Earth: What she did prior to the series' start (travelling from Tibet to Japan on foot) and what she and Yakumo end up doing for a good portion of the series.
 * You Don't Want to Die a Virgin, Do You?: Parvati sleeps with Yakumo.
 * You Don't Want to Die a Virgin, Do You?: Parvati sleeps with Yakumo.

Fujii Yakumo

 * Badass Normal: For the first two or three volumes, his only advantage is his Healing Factor.
 * Badass Abnormal: After the Time Skip, he returns as a summoner/martial artist/zombie. Later events power him up to a level where he can fight evenly with Benares and gain a Red Baron status with other lesser demons.
 * Chick Magnet: Damn near every female in the series who doesn't already have a partner has had a crush on him at some point. Doesn't matter if they're human or not.
 * Defeat Means Friendship: If whatever he's fighting with is not explicitly aligned with the Big Bad (there are exceptions) and doesn't die, this usually happens.
 * Determinator: His defining trait.
 * Game Face: After his merge with  whenever he uses the latters power, his body gains some of the latter's demonic features.
 * Green-Eyed Monster: Was not happy about Pai's Arranged Marriage to Koko.
 * Heroic BSOD: Happens a few times. The most striking ones were when . Doesn't keep him down for long.
 * I Just Want to Be Normal: His goal at the beginning, later it comes after saving the world.
 * Implacable Man: Having regeneration and basically being undead means nothing can keep him down as long as Parvati is still alive. Not even if you blow him up into the atomic level.
 * Nice Guy: Most of the time.
 * Older Than They Look: For the most of the series he is around his twenties while still looking 16, it gets jarring in 3X3 Eyes Gaiden where Yakumo may already be 30, and due his immortality still looks underage.
 * Overshadowed by Awesome: Despite being a Badass capable of leveling entire cities, he rarely gets any easy fights, and only gets the upper hand against Benares a few times.
 * Parental Abandonment: Dad's obsessed with the occult and was never home, mom left him to fend for himself because of it.
 * Took a Level In Badass: Starting with the Time Skip and just continues from there.
 * Worthy Opponent: As a fellow Wu, Benares considers him this.

Natsuko

 * Designated Victim / Damsel Scrappy: Every time she appears, Yakumo has to save her.

Ling Ling

 * Badass Normal: For the first two volumes, she's shown as an Action Girl and was the first to train Yakumo in martial arts, but simply Can't Catch Up as the series goes on. She's still a prominent character, however.
 * Money, Dear Boy: One of her primary motivations when she was first introduced.
 * Pointy Ears: She's never been shown as anything but a human, no matter what this trope may imply.

Steve Long

 * The Worf Effect: You know it's getting serious when his spells can't do anything about the situation.
 * Those Two Guys: With Ling Ling.

Ms. Huang/Shunkai

 * Dragon Lady
 * The Mole: Not a spoiler. The readers know this from the moment she appears.
 * The Mole: Not a spoiler. The readers know this from the moment she appears.

Benares

 * Badass
 * Blood Knight: Especially clear when he's fighting Yakumo.
 * The Dragon: To Kaiyanwang. Literally too.
 * It Only Works Once: Any time Yakumo uses a new trick against Benares, he will have a counter ready or prevent Yakumo from using it in the first place in their next fight.

Kaiyanwang/

 * Big Bad
 * Brainwashed and Crazy: All Kaiyanwang are like this, apparently.
 * Legacy Character: Kaiyanwang is a title bestowed upon those who have undergone the Human Ritual and obtained the power to lead the Sanjiyan race.

Naparvha

 * Bare-Fisted Monk: His martial skills are apparently on par with Yakumo.

Himeji Ryoko

 * Brainwashed and Crazy: Happens when she gets her memories back.
 * Combat Medic:
 * Cute Monster Girl
 * Genki Girl: What she retained from Pai.
 * Identity Amnesia: She's Pai as a schoolgirl and with a different name.

Haan

 * Artificial Limbs: One of his arms was replaced by a summoned beast that can turn into a scythe-like weapon after he lost it.
 * Badass Normal: A completely normal human being who can go toe-to-toe with demons. He even managed to beat one of Benares' lieutenants!
 * The Rival: Considers himself this to Yakumo.
 * Love Triangle: He loves Ryoko, who seems more interested in Yakumo. They get closer with time.
 * Love Triangle: He loves Ryoko, who seems more interested in Yakumo. They get closer with time.

Connery/Bem Madurai

 * Badass Grandpa
 * Really 700 Years Old: He was alive before Benares was sealed away, which means he's at least 1000 years old.

Ukai

 * Cute Monster Girl
 * Token Mini-Moe: Well, she's actually Really 700 Years Old, but she's the smallest character in the entire series and acts like a little brat most of the time.
 * Tsundere: Would you believe she
 * Tsundere: Would you believe she