Hmm.  Are there any spells or wondrous items that would allow one to use trained-only skills without having any ranks in them?  I'm thinking Torahime's training dojo might include a Sparring Dummy of the Master or two that she can use during the first big time-skip we get, but she'll need a way to make some Use Magic Device checks to pretend to have a level in Monk while training with it.