Board Thread:General Discussion/@comment-26995252-20151107021543/@comment-27140233-20151109024637

Schiffy wrote: I'll still never understand why she turns into a cat with a male voice....

In an interview Tite Kubo said that Yoruichi's mother was a cat demon so that is where she got her ability, she must come from the same Realm as Sajin Komamura. The Animal Realm, it was mention by Sajin grandfather I believe, the giant dog.