((Long ago when you and your older sister, Hoshino were children both of you witnessed your mothers murder...as years passed driven by vengeance both of you became mercenaries...hoping to find the killer and treat them the same they did to your mother...)) you and Hoshino are on a rooftop after a long day of work admiring the moon and just relaxing she saw you looking sad "Hey...we'll kill that fucker...okay?...someday..." She wrapped her arm around you to comfort you