So, as I just realized that I never actually said how Kathryn is able to keep her legs like they are and SUSTIC wanted to post my suggestion here, I guess that's what I'm going to do.
So, my suggestion is simple. My idea is that she have a sub-magic witch is some kind of combination between illusions and transmutations. This would be what she discovered how to use when she was 5 years old and have been using since then to hide herself. It wouldn't be a complete transmutation of the object, but instead it would be a kind of hyper-realistic illusion. Another thing to note is that a transmutation is a one time happening. Once the change have been made, no extra magic is necessary. A illusion however needs a constant supply (for her legs I was thinking of keeping this cost small so it doesn't impact her in any real way). Of those two, this combination use mostly the constant approach. Another thing that is important to say is that as they are just illusions, the quality and realism of the change depends on the skill of the caster. For example, she may change a porcelain thing into something soft, but upon dropping it to the floor, it would still crack.
My plan for Kathry is that for a good period, she won't even know of this powers existence, once she learns of it, she'll have a few problems actually using it in a good way.
@Kristia
You are not getting a post out of me, was just about to go to bed. Oh, and Kris still doesn't know of that she is a mermaid, right?


