@Dark_Tifanny69 : The little sister does for sure, she seem to have come here exactly to find her sister but for some reason either couldn't muster the courage to go and reconcile, or did but the sister's dislikes for their mother made her refuse.
@Dark_Tifanny69: They're 2 years apart. L'il Sis is in the same class as Rin, who's a first year, while Big Sis is in the same class as Ryuu, who's a third year. Basically, they've got until the end of this school year to find each other, or Big Sis will graduate and go off somewhere and they may never see each other again.