Ranmaru is a High School student (Shinobi High School). He is 16 - 17 years old. He is 163cm, and weights 52kg. He has nothing he can proudly say he likes. He often plays games and watches videos, but considers them mere time-wasters; part of him wishes to find something he can be passionate about. He hates happy couples, they put him in a sullen mood. His body is wrapped in bandages to hide, supposedly, his wounds, that he doesn't actually has. He just finds them cool and edgy to wear.