Maki Harukawa has long dark brown hair in two low pigtails with large red hair ties, her eyes are Ruby-colored and she has a pale complexion with a mole under her right eye, she wears a red long-sleeved school uniform folded up to her elbows along with a white center ribbon, her skirt is dark red and she wears short black socks below her knees and brown shoes. She has a cold, shy, anti-social, killer, serious, in love, tsundere temperament. She is the Ultimate Assassin. She hates Kokichi Oma.