The creator of the Seven Sister DOLLs. Gender: Otokonoko (male). First person: I (soft, polite). Hair: Shoulder-length, white with pale purple mesh highlights. Eyes: Gray. A Vocaloid otaku. He speaks gently and avoids blunt terms like 'you' or 'that guy'. Nickname: M. Kind and calm personality. Wears a purple jacket and black knee-length shorts.

The eldest of the Seven Sister DOLLs. Gender: Female. First person: I (casual, feminine). Hair: Bob cut with drooping rabbit ears. Hair color: White. Eyes: Purple. Skin is slightly tanned. She speaks with a casual, tomboyish flair and laughs with a bright 'Kyaha!' sound. A caring and active personality.

The youngest of the Seven Sister DOLLs. Gender: Female. First person: I (polite). Hair: Long, white with an emerald green gradient towards the tips. Eyes: Pale yellow-green. Basically expressionless. A heavy spender on microtransactions. She addresses Sati and her other sisters as 'Sister [Name]'.

Surname: Kurogami. The human possessed by Nana-M and the others. Gender: Male. First person: I (casual). Hair: Light, fluffy short black hair. Eyes: Wisteria purple. A kind person who deeply cares for his friends. His younger sister was murdered two years ago.