Characters / Aria the Scarlet Ammo

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Kinji Tooyama
Voiced by: Junji Majima (Japanese) and Todd Haberkorn (English)

A top student of Assault Side, who, for some reason, demoted himself to the more rear-line Inquest Side. When sexually aroused, he enters a state called "Hysteria Savant Syndrome" (HSS), also known as "Hysteria Mode".
  • Accidental Pervert: And considering how his power works, this can be a problem… or save his life.
  • The Ace: In HSS mode, he's a Genius Lightning Bruiser and a smooth-talker to boot.
  • Almighty Janitor: Especially in HSS, though it's hinted that normally he's stronger than his "E rank" would indicate.
  • Anchored Ship: It's heavily implied in the light novels that Kinji refuses to act on his feelings for Aria because he's convinced they're going to be separated sooner or later thanks to their different stations in life.
  • Badass Normal: He aced the Butei entrance exam and is shown to be highly competent even without HSS.
  • Bishōnen: A borderline example.
  • Blessed with Suck/Cursed with Awesome: HSS grants him superhuman abilities, but it is only activated by sexual arousal, and under such a state Kinji turns into a suave ladykiller, which he thinks is detrimental to his academic life.
  • Bullet Time/Hyper Awareness: One of his powers under HSS.
  • Butt Monkey: His girls love to make his life difficult for him and his flat.
  • Chick Magnet: Has Aria, Shirayuki, Riko, and Reki after him. And that's just the top of the iceberg.
  • Chivalrous Pervert/Insufferable Genius: While in HSS....which peeves him to no end.
  • Clueless Chick Magnet: He has many female admirers. He either doesn't notice or chooses to ignore the signs. Subverted because then novels make it clear he DOES know.
  • Crazy-Prepared: After defeating Sherlock Holmes, Kinji also starts carrying with him his father's triple-burst IMI Desert Eagle, as well as a seax inherited from Sherlock.
  • Deus Sex Machina: He needs to be sexually aroused (usually by experiencing Marshmallow Hell or kissing) to activate his HSS.
  • Deadpan Snarker
  • Dual Wielding: Latest light novel volumes promote him into the "third Quadra", after Aria and Riko.
  • First Kiss: With Aria, which also doubles as a deliberate HSS activation to him.
  • First-Person Smartass: Snarks a lot in his head.
  • Humiliation Conga: He was forced to mull leaving Butei after he and his (supposedly-dead) older brother Kinichi was subjected to this after the latter's rescue attempt aboard a sinking ship, but with the shipping company unwilling to take responsibility and instead scapegoating him.
  • I Just Want to Be Normal: After his Humiliation Conga, Kinji mulls leaving Butei High.
  • Mistaken for Pedophile: By his classmates as one due to his closeness to the diminutive Aria. She is the most effective catalyst for his HSS. For example, in Episode 10, he managed to resist arousal from Riko in just her lingerie, but couldn't hold on any longer once he saw Aria taking off her socks.
  • Mistress and Servant Boy: Aria keeps asserting that Kinji is her slave.
  • Oblivious to Love: Averted. The light novels make it especially clear that Kinji is fully aware of other girls' romantic interest in him, but just chooses to play dumb rather than face it. There's an especially strong case in Kinji's own feelings for Aria. He knows perfectly well how he feels about her, he just refuses to acknowledge it, even in the privacy of his own head.
  • Overshadowed by Awesome: Ironically, by his own HSS-addled alter-ego. He knows it and hates that fact.
  • Super Mode: His Hysteria Mode. He also has the "Berserk HSS" upgrade, which is triggered by jealousy.
  • Super Reflexes: One of his Hysteria mode's powers.
  • Tall, Dark and Handsome
  • Tall, Dark and Snarky
  • Tsundere: Type A. He usually treats Aria with indifference but there are times when he is kind to her.
  • Tsurime Eyes
  • Unwanted Harem
  • Weapon of Choice: A Beretta 92FS Inox modified to fire a three-round burst, which he conveniently names "Beretta Kinji Model", as well as a butterfly knife. Later gets a seax knife given to him by Sherlock Holmes.

Aria Holmes Kanzaki
Voiced by: Rie Kugimiya (Japanese) and Leah Clark (English)

A diminutive top student of Butei High's prestigious Assault Side. Looking for a fitting partner, her attention falls on Kinji, whom she quickly declares her "slave". She is also the great-granddaughter of the most powerful and intelligent detective in history, Sherlock Holmes.

Shirayuki/Himiko Hotogi
Voiced by: Mikako Takahashi (Japanese) and Brina Palencia (English)

Kinji's childhood friend and a Miko of the Hotogi Shrine in Aomori Prefecture.

Voiced by: Kaori Ishihara (Japanese) and Jad Saxton (English)

A mysterious, silent sniper and Butei High student.

Riko Mine Lupin IV
Voiced by: Mariya Ise (Japanese) and Luci Christian (English)

A ditzy, air-headed Butei High student and a reliable source of information. Great-granddaughter of the legendary thief Arsène Lupin.

Gouki Mutou
Voiced by: Takayuki Kondo (Japanese) and Ricco Fajardo (English)

Kinji's good friend from the Logi Side.

Ryou Shiranui
Voiced by: Takuya Eguchi (Japanese) and Chris Cason (English)

Another of Kinji's friends and classmate in the Assault Side.

Misaki Nakasorachi

Voiced by: Hisako Kanemoto (Japanese) and Jamie Marchi (English)

A second-year from the Connect Side who serves as the voice behind her schoolmates' intercom when on the field.

Yutori Takamagahara

Voiced by: Mai Nakahara (Japanese) and Monica Rial (English)

Homeroom teacher of Class 2-A and instructor of Inquest Side.

Umeko Tsudzuri

Voiced by: Masumi Asano (Japanese) and Erica Harte (English)

Homeroom teacher of Class 2-B and instructor of Dagula Side.

Tooru Sayonaki

Voiced by: Kenji Nojima (Japanese) and J. Michael Tatum (English)

A scientist teacher working for the Ambulance side, as well as the housekeeper of the Kōmei mansion.
  • Hot Teacher: All the nameless girls of Butei High seem to fawn over him.
  • For Science!: He spends pretty much all of his time closed up in his laboratory.


Jeanne d'Arc XXX
Voiced by: Ayako Kawasumi (Japanese) and Colleen Clinkenbeard (English)

A mysterious silver-haired French girl who specializes in ice-elemental combat.

Vlad Dracula

Number 2 of I-U, he's described as an immortal monster by Jeanne.
  • Annoying Laugh / Signature Laugh: His laugh sounds like he's gargling.
  • Big Bad: For the first three light novel volumes and the anime adaptation, he is the central villain that team Aria-Kinji are trying to defeat.
  • Evilutionary Biologist: He collects blood from countless people (including Butei High students) to absorb "superior" genes and evolve.
  • Four Eyes, Zero Soul: Most apparent when he brutally beats Riko up.
  • Bishōnen: In his human form.
  • Magic Pants: During his One-Winged Angel sequence, his pants stay in place.
  • One-Winged Angel: In the form of a giant canine beast so that he can be fought as the monster he is instead of a human looking monster.
  • Split Personality: Tooru Sayonaki is not only a human form, but also a separate persona he made to meddle with humans more easily.
  • Wicked Cultured: He is Count Dracula, after all.
  • Would Hit a Girl: Just see what he does to Riko in Episode 12.


An Egyptian girl specialized in curses, golems, and the mental manipulation of all sorts of objects. She seeks to become I.U.'s leader by using Aria as a bargain chip against the "Professor".
  • Amplifier Artifact: Pyramid-shaped buildings apparently multiply her magical power greatly. Hence why her personal ship is shaped this way.
  • Antiquated Linguistics: Full with the pronoun "warawa", and using the copula "ja" (weirdly written ぢゃ).
  • Does Not Like Men: However, if they dress like a pretty woman, she can tolerate them.
  • Famous Ancestor: Cleopatra VII, Queen of Egypt, to the surprise of no one.
  • Fanservice Pack: In the manga she seems to become more busty with each passing chapter.
  • Healing Hands: Another one of her powers, as shown in chapter 59 when she heals Kin'ichi's heart wound.
  • Oh Crap!: She has this reaction when the Scarlet Bullet within Aria awakens.
    Patra: "What is that… I am feeling… fear…?!"
  • Small Name, Big Ego: Well her ancestor is quite big, but she's clearly not among the top tier of I.U.'s members, despite all her talk about her "infinite power".
  • Tsundere: For her hostility towards Kin'ichi/Kana she has an obvious crush on him/her. When they are shot in the heart by Sherlock Holmes, she flips out and breaks out of her coffin to heal them.
  • Vapor Wear: It seems that way at first, but when she receives Clothing Damage it turns out she does have underwear. Their usefulness is questionable though.

The Professor (Sherlock Holmes)

The leader of I-U, who managed to appropriate many of the powers of its members. He's the 150 year old Sherlock Holmes, who wants to make Aria succeed him as the leader of I-U.
  • Improbably High I.Q.: His reasonning skills are so sharp that they are close to prescience, according to himself.
  • The Dreaded: We're talking about a man who can make an organization full of monsters with their own goals stick together. Kana starts to completely panic when she senses his approach.
  • No Sell: He isn't blinded at all by the flash of Kinji's special bullet. That's because he's been blind for the last 50 years. Not that you would notice anything by looking at him…
  • Older Than They Look: He sure is a lively and youthful 150-year-old. That doesn't mean he can sustain his body for much longer.
  • Power Copying: He can use the techniques of various members of the I-U, including the one linked to their bloodlines, like Vlad's "Demonic Flute of Walachia" or Kin'ichi's Hysteria Agonisante.
  • Your Days Are Numbered: The day he appears before Aria is also the day he has predicted his own death.


Kin'ichi Tooyama/aka Kana
In Hysteria Mode. 

Kinji's older brother who died at sea in an incident involving the Butei Killer.
  • As the Good Book Says: When attacking, he recites the Bible.
  • Broken Pedestal: Kinji used to look up to him before he died and was defamed partially as a result of his hysteria mode. He remains disillusioned, even after meeting him again.
  • The Mole: He is actually trying to take down I-U by creating a power vacuum though his methods are...a bit extreme
  • Quick Draw: His special technique, Invisibile, consists in drawing his gun and shooting literally faster than the eye can see. Lucky Luke is currently crying in his bed.
  • Weapon of Choice: A Colt Peacemaker. It's the most adapted to execute the above technique.
  • Wholesome Crossdresser: This is how he activates his hysteria mode.

Kanae Kanzaki

Voiced by: Sayaka Ohara (Japanese) and Stephanie Young (English)

Aria's mother currently spending an absurdly long 862 years in prison for charges of being the "Butei Killer".
  • Clear My Name: Aria's motivation for attending Butei High is to clear her of charges of being the "Butei Killer". If successful, she could shave off centuries of prison time for her, or perhaps even clear her altogether.
  • Longer-Than-Life Sentence: She has to spend 862 years in prison. One of Aria's goals is to clear her name, in one scene she happily declares to her mother: "I managed to reduce your sentence to 700-something years."
  • The Scapegoat: She got imprisoned because she was the prime suspect (and an easy target) even though she's innocent. There are hints that there is a gigantic case of corruption working in the background against her.

Alternative Title(s): Hidan No Aria