Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-59.178.181.142-20140306185455/@comment-13965604-20140313142333

Antonioleyba wrote: Maybe she decided to become human and she did it around the 800 year mark to be with Mr. Yukimura forever

A spirit creature cannot 'become' human in the sense you are saying. That's like saying a white person decided to 'become' black

Grahamburglar wrote: if kitsune are shapechangers (like we've been told but never seen) perhaps their age and appearance are subject to how they want to be perceived.

I think until it is addressed on the show, if it ever is, that this is the only explanation that makes even the slightest but of sense, at least in my head.