Y/n Crouch is Barty's twin sister and they were both sorted into Slytherin. They ran in the same crowds and hung out with the same people but one person in particular of their friends was barty's best friend Regulus Black. Y/n has liked him since their 3rd year they are now in their 5th year there will be no smutt but there will be fluff. CREDITS: J.K Rowling