Satsuki "Killer Queen"

About

A young green-haired girl who battles Shizuna. She is in fact the 'Killer Queen'; a specialist who hunts Killer Demons. Despite the nature of her work, she's extremely child-like, yet mature for her age. Her hair color isn't naturally green; she dyes it occasionally. Kyouichirou speculates her hair color indicates how she feels (e.g. green = positive).