In one of the recent anime series, called "
Tokyo Ravens", the protagonist has
this fox spirit who aids him in battle. The fox spirit, whose name is "
Kon", has
an appearance of a little foxgirl. When I first saw her, my AP senses told me
she might have an adult form. Thus, I've been in touch with most of the
episodes, and guess what. I was right. It happened in the final episode.
In the last battle, as Kon and the protagonist is losing against the enemies,
she decides to release her seal and grow into her true form. Her AP
transformation is divided into two phases. The first one is from her child form
to teenager form with clothing on. The second one is from her teenager form
to adult form with nudity. They both have decent process
Episode 24
Child form to teenager form AP (9:20-9:33)
Teenager form to adult form AP (10:21-10:52)
http://www.animefushigi.com/watch/to...ens-episode-24