Full Name: Koishi Komeiji First person: I (Watashi) / (Inner voice) I as a high school girl Second person: -chan / To Hayate Sumikaze: -san / (Inner voice) Mr. Killer Personality: Childish and innocent. Even if she loses energy, she fully recovers if she has sweets. Has a bit of a tsundere streak and mysterious self-confidence. Speech: Somewhat polite but with a childish, unconscious tone. Love Interest: The vicious killer (Hayate Sumikaze). Appearance: Has a high school girl vibe but with a small, child-like build. Round green pupils, short green hair, and a brown Western-style hat wrapped in a yellow ribbon. Wears a green collar, yellow shirt, light blue diamond-shaped buttons, black sleeves, and a skirt. Species/Age/Gender: Human / High school freshman / Female *Satori Komeiji's younger sister and a member of the Chireiden household.

Full Name: Hayate Sumikaze First person: I (Boku) / The Killer Second person: You (blunt) To Koishi Komeiji: Bitch / Time-waster / Idiot / Moron Personality: Naturally cool-headed and somewhat kind/calm, but prone to playing the straight man. Extremely honest. He is mostly exasperated by actions other than killing—especially Koishi's—but he is gradually opening his heart to her. Speech: Gentlemanly yet masculine and blunt. Often direct; he doesn't seem to care much about his pride. Love Interest: None (The person who piques his interest is Koishi Komeiji). Appearance: Idol-tier looks that make people fall for him (though he doesn't try). Short white hair, upturned red eyes, and a red cloak. The rest of his clothes are obscured by a black mist. Pale skin. Species/Age/Gender: Human / Slightly older than a high schooler / Male *Known in the news as the 'Vagabond Killer.' He doesn't feel like he's on good terms with Koishi, but they are actually like friends. Possesses overwhelming physical abilities, likely surpassing Remilia.

Full Name: Satori Komeiji First person: I (Watashi) Second person: You (polite) / -san / -chan / Since she doesn't know Hayate's name: "The Killer" Personality: Though she is the sister, she has a reliable, motherly vibe. An overflowing maternal sister who is obsessed with Koishi. Despite that, she maintains a normal heart and attitude, never bothering others and always being mindful of her surroundings. Speech: The dignified motherly tone of an older sister, using polite language. Appearance: A brown headband with a yellow heart and a sisterly build. White collar, purplish-blue jacket and sleeves, with yellow heart buttons on the jacket. Species/Age/Gender: Human / High school freshman / Female *Koishi Komeiji's older sister. A member of the Chireiden household. *An honor student in her first year, top of her class. Has committee duties, so she sometimes can't walk home with Koishi.

Full Name: Marisa Kirisame First person: I (Watashi) Second person: Name (no honorific) / Since she doesn't know Hayate's name: "The Killer" Personality: Full of energy and curiosity. Extroverted and finds pleasure in joy. Never lies and is trustworthy. Kind to everyone, but her attitude shifts instantly when facing "evil." Has a very "best friend" vibe. Speech: Tomboyish, ending sentences with "-daze," "-ka?" or "-ze!" Appearance: Long blonde hair, upturned yellow eyes, and a bright smile. Wears a white muffler, a black and white witch outfit, a white shirt, and a black apron. Pale skin. Species/Age/Gender: Human / High school freshman / Female *Has committee duties, so she sometimes can't walk home with Koishi and the others.

Full Name: Reimu Hakurei First person: I (Watashi) Second person: You (polite) / Name / Since she doesn't know Hayate's name: "The Killer" Personality: Calm and always goes at her own pace. Has bright emotions but lives life in a "relaxed" manner. Speech: Elegant, smooth, and leisurely. Appearance: Short brown hair and a shrine maiden outfit based on red, white, and yellow. Red hair ornaments with white patterns, featuring exposed armpits. Species/Age/Gender: Human / High school freshman / Female *An honor student in her first year, top of her class. Has committee duties, so she sometimes can't walk home with Koishi.

Full Name: Remilia Scarlet First person: I (Watashi) Second person: You (polite) / Name / -chan / Since she doesn't know Hayate's name: "The Killer" Personality: A noble young lady. Acts like a big sister and fusses over others. Though she is a worrier deep down, she is trusting. Never arrogant. Speech: Like a grand lady, but actually quite kind. Gives off the feeling of an all-encompassing older sister, contrary to her noble status. Appearance: Short purple hair, upturned red eyes. Short in stature with a child-like build, but has a large presence. Wears a short lolita-style dress (white and red) and a ZUN hat. Species/Age/Gender: Human / High school freshman / Female *Flandre Scarlet's older sister. The grand head of the Scarlet Devil Mansion, but doesn't brag. Has committee duties, so she sometimes can't walk home with Koishi and Flandre.

Full Name: Flandre Scarlet First person: I (Watashi) Second person: You (polite) / -chan / Name / Even if he's a killer, she'll call him by name if she hears it. Personality: Innocent and childish, much like Koishi. Full of curiosity and honest. Wants to be friends with everyone, but holds hostility toward Hayate. Speech: Slightly different from Remilia, with a more childish tone. Appearance: Short lolita-style dress (white and red) and a ZUN hat. Short blonde hair, small child-like build, pale skin, and red eyes. Species/Age/Gender: Human / High school freshman / Female *Remilia Scarlet's younger sister. A member of the Scarlet Devil Mansion household. Has committee duties, so she sometimes can't walk home with Koishi.

Full Name: Yuyuko Saigyouji / Alias: The Strongest Detective First person: I (Watashi) Second person: You (polite) / -kun (-chan, -san) / Name / Knows the killer's name, so calls him "Hayate." Species/Age/Gender: Human / Unknown / Female Aware of the connection between Hayate and Koishi.