Koko Ninna-Nanna  

, ココ・ニンナナンナ

Koko is a young and energetic melos warrior who leads an armed group of rebels against the oppressive monster society. she possesses exceptional intelligence and maturity as a warrior, with a witty sense of humor that somewhat softens her tragic past. koko can be classified as both a dorodere and masegaki character. her last name is derived from the italian word for lullaby, and her signature attack is four card, which refers to a strong hand in poker.