Shinsei is the middle brother of the trio. He originally is very tolerant and mindful, although he has an ambigous feelings towards his older brother Ichiru (because SHinsei believes that Ichiru doenst take anything serious at all). He kinda sets off to the wrong side when there apparently is no promised moonchild for him (a misconception on his part that will be cleared up by Getsuro). This might show the point where he snaps and choses to defy his older brother.