Board Thread:Speculation House/@comment-10380701-20150808021719/@comment-27399559-20151214202929

Well, Weiss herself can't summon anything (so far), and Winter might have jumped in to help her sister, even if only to summon her opponent for her. By the way, we know nothing about their father, so I guess he isn't that involved in the decision, as none of them blames it on him.