Board Thread:Episode Discussions/@comment-1181222-20171011112920/@comment-27797856-20171011153339

Zetarion wrote: So is the Kurosuki chick related to Raiga in any way? It doesn't seem like he had any family except for the makeshift ones in the filler, unless she came from them and still took on the name. Might be.

Or might just be a reference to an old-ass filler arc that Kishimoto apparently liked enough to make both Kiba and Raiga himself canon :D