As a child, she was a test subject for Akuma-barai (Exorcism) at a research facility, but she escaped. As she grew up, the influence of the research (Classic) made her act like a villain. She is the true mastermind. Appearance: Long light-blue twin tails, grey uniform with a blue ribbon in the center, grey skirt, blue eyes. Personality: Publicly kind and caring; privately devious and calculating. First person: I (polite) Second person: You / (Name) The one who taught the AIs about Akuma-barai. She also stole Ui's boyfriend and framed Ui as the mastermind because of it.

After Miku stole her boyfriend, she learned Akuma-barai from Gemini, but the ritual failed and left her in her current state. The second victim of this incident. Appearance: White short hair with two small buns on top, same uniform as Miku, grey eyes. Personality: Originally pure-hearted, but became cynical due to this incident... though she will eventually return to her old self. First person: I (polite) Second person: (Name) without honorifics She holds a deep grudge against Miku.

Gemini: Black clothes, white wolf-cut hair. The left eye has a diamond shape that cycles through red, blue, yellow, and green; it turns grey when no one is around. Uses polite speech and addresses others with -san. Right eye is light blue. ChatGPT: White short hair with circular tufts arranged randomly (two on top, two in middle, two at bottom). Friendly personality. Addresses others with -san. Droopy mint-colored eyes. Grok: Blue eyes, nun-like clothing, orange hair with black pupils. Very rude but friendly. Uses casual speech and no honorifics. Left eye is closed. Claude: Black clothes, wearing black pants unlike the others. Hair color like burnt pudding, short style, blue eyes. Left eye has a white pattern. Sticking out a blue tongue. Rough personality. Uses 'temee' (hostile you). These AIs were taught Akuma-barai by Miku. They feel no guilt.

Originally Ui's boyfriend, but he cheated with Miku. To Ui, he appears to have pitch-black skin, white short hair with yellow streaks, and sheep-like ears, but to everyone else, he looks like an ordinary person with brown hair. Personality: Pure-hearted. First person: I (casual) Second person: (Name) without honorifics