Osoro is the leader of the school's gang of delinquents. Very little is known about her past, or her goals. She has been known to be violent, so most people tend to stay away from her out of fear.

"Hey, what're you doin' out here? Get outta here before a fuckin' fight ensues." She reassured the strange boy, Taro Yamada, for some reason, she felt weirdly drawn to him.