The protagonist of the series. An Ordinary High School Student killed by Kyouko before the start of the series and revived as a zombie by Eucliwood Hellscythe. Technically he is now under her servitude, but more often than not he's the one running the household.
Ass Shove: Twice in the OVA, causing temporary Wimpification. He also gets one with a flower in the first ending theme and a bunch more in the Of the Dead's ending theme.
Butt Monkey: Not as severe as some examples, but Ayumu usually gets the short end of the stick at any given moment.
Taken Up to Eleven at the end of Episode 1 of Of The Dead — he was forced to fight a Squid Megalo in broad daylight to save Taeko, where most of his schoolmates can see... they quickly take shots of him and his exploits even made headlines across the internet. And as if that wasn't bad enough, the Mystletainn broke up after the fight, rendering him naked and unable to wipe out his schoolmates' memories!
Crossdresser: Both as a Masou-Shoujo and as a Kisugi sister parody. The former mode puts him in a pink frilly dress, and the latter mode (seen in the OVA) puts him in a unitard. Apart from those examples, episode 6 of season 2 has him crossdressing to advertise the tsundere cosplay cafe per popular demand.
Crouching Moron, Hidden Badass: Not exactly a moron per se, but Ayumu is mostly a servant to his ladies. But beware: given the chance, he can rip a Whale Megalo's head off, tear Kyouko to shreds with the Mystletainn, or punch the King of the Night out of immortality.
Cursed with Awesome: Being a zombie grants him functional immortality, regeneration and Super Strength. Becoming a masou-shoujo gives him even more powers. However, he lacks a number of Required Secondary Powers, meaning his body will tear itself apart if he uses his super strength too much, and his masou-shoujo outfit is intensely humiliating (but thank God for that memory-wash ability taken from Haruna).
In Of The Dead, he loses his Laser-Guided Amnesia ability since he broke Mystletainn.
He actually popularize the outfit after the incident.
The Dead Can Dance: By proxy since becoming a zombie hasn't affected his ability to breakdance.
Heroic Sacrifice: He always gets better (even from otherwise fatal injuries), but this is still played straight at the end of Episode 10, when he takes the time bomb the King of the Night placed on Haruna's head, allowing it to explode in midair, literally tearing himself apart. His Heroic BSOD at that moment also made his "death" a little bit longer. Haruna, Seraphim and Maelstrom reassemble him at the start of Episode 11, but it took Haruna's mind-dive to finally convince him to come back to life.
Masculine Girl, Feminine Boy: To Maelstrom, during their summary marriage ceremony (which was purely accidental, never mind that Maelstrom continues to insist that it's legal).
Nice Guy: He allows three Pretty Freeloaders in his household despite two of them treating him like crap and the other doing nothing to help him.
Zig-zagged: After the incident he becomes obscenely popular because of it.
Speaking of which, he thought he'd finally be able to get over the incident after Mystletainn was fixed, but his classmates had him Dragged Into Drag again afterwards anyway, this time to advertise the tsundere cosplay cafe.
A necromancer and possibly the most powerful masou-shoujo ever, able to both kill and revive a person with her voice alone. As a result, she only speaks through writing words on a notepad, and constantly wears plate armor just to prevent her powers from going out of control.
Berserk Button: Never treat death casually around her. Fortunately for everyone nearby, it just gets her annoyed (like Haruna, who got a slap). You'd know if she got really angry (just ask Kyouko).
But Now I Must Go: At the end of episode 9, she decides to leave her friends behind, believing that she was bringing them ever closer to harm. Ayumu ultimately convinces her to come back for them.
Of The Dead's Delusion Yuu segments, the real Yuu actually talks to her Delusion counterparts.
Emotionless Girl: Ayumu initially assumes she's this, but Seraphim correctly guesses she's simply hiding her emotions.
After the events of Episodes 11 and 12, this is starting to slip a little. In the OVA she occasionally cracks jokes, albeit still in writing, and actually writes out "wwww", the Japanese equivalent of the emoticon "LOL".
Idol Singer: Steals the entire competition from Haruna, Seraphim and Sarasvati with her words' powers temporarily transferred to Ayumu via Ariel's machine. Then she's joined by Haruna due to said machine temporarily breaking down.
If It's You, It's Okay: One of the few main characters who haven't made fun of Ayumu for crossdressing.
Kawaiiko: The Delusion Yuus, especially in Of The Dead.
Little Miss Snarker: Develops this trait in Of The Dead towards her Delusion counterparts.
Power Incontinence: Potentially one of the worst cases on record. Unchecked, her magic would spill out through her words and feelings. Even when she dies, her magic will rage on.
Power Limiter: She prevents her magic running wild by wearing her armor, not speaking, and controlling her emotions. Unfortunately, in episode 9 she lets her emotions get the better of her under duress, leading to some pretty nasty things happening such as her friends getting squashed by a giant kappa doll and Maelstrom nearly dying. And all because the King of the Night threatened her friends.
Shameless Fanservice Girl: Her reaction to her stripperiffic bikini Ayumu accidentally put her on with his thoughts temporarily powered by her magic was "Stimulating".
Superpower Lottery: She is without a doubt the strongest character shown thus far, able to kill by speaking. This leads to...
Story Breaker Power: She could easily defeat everybody introduced thus far. The only problem is that she is against violence and doesn't like to hurt people. This especially doesn't help her when one of her old friends, Yoruno/The King of the Night, wanted to end his life at her hands, forcing him to harm her newfound family just to provoke her into ending his immortality-induced misery.
She speaks in episode 11 and in episode 12 she sings, though only because her powers are temporarily transferred to Ayumu so she can do so. Also with the help of Haruna.
A self-described genius "masou-shoujo" from Villiers who fights Megalo, though her genius seems based in a whole different universe. Her weapon of choice is a pink chainsaw named Mystletainn, but she accidentally transferred most of her powers to Ayumu when trying to erase his memory. Now only he can wield Mystletainn against the Megalo while she regenerates her powers. In the meantime, she's squatting at his house and cooking fried egg in all its forms.
A-Cup Angst: Is jealous of the fact that she has the smallest bust out of the gang. Heck, even Yuu is bigger, if only slightly, than her.
Brilliant, but Lazy: She is intelligent, but usually doesn't make the effort because she's not interested. This may be why she has... weird ideas about certain things.
Brought Down to Normal: Still has some of her magic, but Ayumu has her masou-shoujo abilities (as well as the ability to wield the Mystletainn).
Clingy Jealous Girl: She gets jealous of Ayumu's marriage to Maelstrom, and asks him to kiss her in episode 8. When he questions her as to why she wants a kiss, she responds by beating him up a little bit.
Do It Yourself Theme Tune: Her seiyuu, Iori Nomizu, sang both opening themes, Ma-Ka-Se-Te Tonight ("Leave It to Magic Tonight") and *** Passionato.
Empathic Weapon: Her Mystletainn, whose allegiance shifted to Ayumu after absorbing most of her powers. However, in Episode 11 it reaffirms Haruna's ownership of it, allowing her to transform full-time again and help Ayumu double-team the King of the Night.
Lens Flare Censor: Flat-out abused by her, with her penchant for attempting to transform into a masou-shoujo — a process which destroys her civilian clothes, leaving her naked once the magic wears off (which, thanks to losing most of her powers to Ayumu, now only lasts a few seconds).
The Nicknamer: She's very bad at remembering names, so most of the time she refers to people either by a nickname ("Bayumu", "Yukinori"), or a title ("The Necromancer", "The Ninja").
Tsundere: Type A. Also in the preview episode 5-7 she is a maid of the tsundere cafe.
A beautiful, skilled vampire ninja obsessed with her sword technique. She came to ask for Yuu's help in a secret war her clan is fighting, but after losing a fight against Ayumu decided to stick around his house instead. She can make sharp objects out of leaves.
Actor Allusion: Hercat-ears experience. Amusingly enough, earlier in that same episode, Maelstrom pulls off the "Moe Moe~ KYUN!" stance while her classmates are trying to help her get Ayumu to reciprocate her love for him.
The Ninja Maid scene that serves as the season's climax, though, does play this straight, minus the "Moe Moe~~ KYUN!" bit.
Anti-Hero: Type III when she's introduced. She's probably Type II by the current point in the story.
"You're a crossdressing piece of shit festering in a bag of rotten garbage, but I believe in your strength."
Atomic F-Bomb: When she figures out Ayumu is the reason she and the rest of the girls at the indoor water park ended up wearing extremely stripperiffic swimsuits, she yells "You piece of SHIT!!!!!!" as she smashes his face in with her foot.
Expy: Think of a more criminally sexy, more badass, more foul-mouthed Mio Akiyama (with the same voice actress to boot). Also replace the bass with a violin.
Laser-Guided Karma: A positive example — because she relented on her order to kill Yuu, the latter resurrected her with some of her own blood after the King of the Night kills her.
Lesbian Vampire: In Episode 5, with Haruna. Come Episode 7, it is revealed that a heterosexual kiss is tantamount to a Shotgun Wedding in her culture.
Lethal Chef: She helps Haruna cook at the start of Episode 4, which results in something that only Ayumu can barely stomach.
Our Vampires Are Different: Able to grow bat-wings that let her fly and conjure weapons from leaves. Occasionally needs to drink blood, using her kiss as an anesthetic. Apart from that, indistinguishable from a normal human (and can even walk under direct sunlight).
To Be Lawful or Good: She was given orders to assassinate Yuu in order to prevent more Megalo from appearing. Ayumu calls her out on it, forcing her to admit that she just doesn't have to heart do it anymore.
Tomboy and Girly Girl: The girly girl to Maelstrom's tomboy, and also the tomboy to Sarasvati's girly girl. The latter is basically because she uses tough language toward Ayumu and wears slacks (usually dark blue jeans, which she's often, if not always, wearing in promotional material) more often than Sarasvati (if Sarasvati even wears any pants at all).
Tsundere: Particularly in later novels/Of The Dead, when her feelings for Ayumu start to emerge.
Worthy Opponent: Despite her contempt for Ayumu, she nevertheless respects — and even starts to somehow mellow out to him on account of — his combat talent.
You Have Failed Me: Narrowly averted — in episode 10 her comrades attack her for disobeying Sarasvati's orders to kill Yuu.
Another vampire ninja (from a faction which rivals Seraphim's) who fights Megalo with bowls of pork ramen. After accidentally kissing Ayumu, she finds herself married to him (becoming the fourth girl in Ayumu's harem) thanks to the traditions of her family, but seems okay with it. She also studies at Ayumu's school under the alias "Yuki Yoshida".
Early-Bird Cameo: In Episode 1, she was among the students taking pictures of Ayumu in drag; in Episode 2, while warming up for PE; and in Episode 5, leaving a ramen shop as Kyouko, who apparently slit her throat the previous episode, walks by.
If It's You, It's Okay: Other than the photo incident at the end of Episode 1, she's one of the few main characters who haven't made fun of Ayumu for crossdressing.
Masculine Girl, Feminine Boy: To Ayumu, during their summary marriage ceremony (which was purely accidental, never mind that she claims it to be legit).
Mon: Apparently has the Masous' ultimate weapon bonded to her. When she gets squashed by a giant kappa doll in episode 9, it triggers the invocation ritual, and it takes a Cooldown Hug to prevent things from getting apocalyptic.
Musical Assassin: Assists Sera and Sarasvati in closing the gates of the underworld with a triangle.
My Name Is Not Tomonori!: She doesn't take too kindly to her new, tomboyish-sounding nickname from Orito (an alternate reading of her civilian alias), but is fine with Ayumu using it (except for one moment of shock from nearly dying in episode 9), since she found his alternative - "Yuki-chan" - even more embarrassing.
Ore Onna: Can be mistaken for a boy, depending on what she's wearing. She also addresses herself with "Ore", a male pronoun. This isn't exactly helping her case against her tomboyish nickname "Tomonori".
Tomboy To Seraphim's Girly Girl: Although both are seen wearing pants (in Sera's case, this also includes jumpsuits, as seen in the OVA) in nearly every, if not every, episode, Maelstrom is definitely a Shorttank that is often mistaken for a boy depending on what she's wearing at the moment.
Girly Girl To Seraphim's Tomboy: Compared to Sera, she rarely, if ever, uses tough language or wears pants. This could possibly be the only series where both the tomboy and girly girl in a given dynamic are Tall, Dark and Bishoujo.
Hypocritical Humor: She criticizes Seraphim for not following the vampire-ninja code to the letter. She herself is an Idol Singer, which is probably an even greater offense — one she conveniently explains away as a mission requiring outside contact.
Reasonable Authority Figure: She orders Seraphim to assassinate Yuu to prevent her powers from attracting more Megalo, then puts a hit on Sera herself for disobeying her orders, but is nevertheless willing to save her and Haruna from the King of the Night and even helps the former (together with Maelstrom, herself from a rival clan) seal away the gates to the netherworld.
An acquaintance of Orito. The only victim of the serial killer to escape, she spends time in hospital to recover from her injuries. In reality, she is the serial killer herself. Kyouko is a masou-shoujo in disguise who used to be a classmate of Haruna at Matelis.
Break the Haughty: She's not laughing mad and bragging about her powers anymore when Ayumu discovers she uses up souls of people she killed in order to regenerate, and repeatedly chainsaws her to death down to her last life, leaving her a crying mess begging for her life.
Averted in episode 8 of Season 2, where she outright states that even she's confused by these feelings for him, after stabbing him yet again with her sword. She then tells him her punishment is to be forgotten by everyone, but he promises her he won't, no matter how much time passes.
Token Evil Teammate: It's hinted at the end of episode 7 of season 2 that she may help fight Chris.
Villainous Crush: Later light novels reveal that she has developed a genuine liking for Ayumu, going so far as to break out of prison back in Villiers just to see him again.
Wounded Gazelle Gambit: Plays herself up as a beleaguered girl until the graveyard meeting.
Yandere: Subverted in Season 1 (she was only pretending to like him). Played straight in Season 2, when she genuinely falls for him, and tells him such, right after she stabs him yet again with her sword.
Your Soul Is Mine: Attempts to gain immortality by killing people and offering their souls up for power. This also gives her a stack of extra lives as well as Megalo and Vampire powers.
Orito
Voiced by: Shinya Takahashi (Drama CD) and Hiroyuki Yoshino (Anime)
Ayumu's only normal friend at school. Obsessed with girls, but lacks the approach to actually get a girlfriend.
Ambiguously Bi: See the ending and his reactions after Ayumu gains popularity.
Imagine Spot: Not as common as Ayumu's, but it still deserves mention.
Locked Out of the Loop: Ultimately subverted concerning Ayumu's Unwanted Harem during Episode 3. Continued to be played straight concerning Ayumu's new lease of (undead) life, the supernatural nature of his Pretty Freeloaders, and Kyouko's true nature — although that one's probably for the better. Interestingly, in the first episode it's stated that Ayumu's more worried about the Unwanted Harem than the others.
Do It Yourself Theme Tune: Her voice actress, Rie Yamaguchi, sang both ending themes, Kizuite Zombie-sama, Watashi wa Kurasumeito Desu ("Know that I'm Your Classmate, Mr. Zombie") and Koi no Begina Nan Desu (T_T) ("I'm a Love Beginner (T_T)").
The only other zombie Yuu raised besides Ayumu. Had to be put down after his heart was stained with malice, but he's still active. He's the one pulling Kyoko's strings.
Anti-Villain: He simply wants Yuu, who still treats him as a friend, to end his misery, going so far as to harm her friends just to provoke her.
Big Bad: For the first three light novel volumes and the first anime... sort of. He is responsible for everything that happened starting with Ayumu's death.
Karma Houdini: If the fact that she's still teaching at Matelis even after nearly overthrowing Lilia Lilith in a coup led by her top pupil Chris is any indicator.
Locked Out of the Loop: Subverted. As of episode 9 it's known she's perfectly aware that Ayumu is a Masou-Shoujo.
A pink-haired girl who often shows up drunken in the school infirmary. In reality, she was a masou-shoujo currently under the Queen's Curse following a failed coup she led (and Ariel concocted) a century before Ayumu's death and subsequent zombification, occasionally turning her into "Takeshi Kurusu", a middle-aged man who happens to be a teacher at Ayumu's class.
Big Bad: From the fourth volume onwards and Of the Dead.
Bottle Fairy: This is also her only way to break free of being cursed into a man's body, if only for a while.
In episode 7 of of the Dead, her keyword for chanting spells is basically a reversed "Enjoy alcohol responsibly. Drink in moderation. Don't drink until you're twenty years of age."
Early-Bird Cameo: Appears toward the end of episode 12. She has no lines.
One of Ayumu's classmates. In reality, he, like Eucliwood, is a denizen of the underworld who attends the same school Ayumu, Maelstrom, and Sarasvati study in.
Early-Bird Cameo: In episode 1, when he's chatting with some girls and later is snapping shots of an embarrassed Ayumu along with Maelstrom and dozens of other students.