Honestly seems to fit with a Troll.
if only there was a way to be a changelling Troll, without you know ending up turning into a Troll.
I made a character based on exactly that.
High concept: Troll blooded art student
Trouble: I don't want to be a troll
If the character is forced to make the choice he'll choose mortal, but until then he'll enjoy helping others with his powers. He is also hoping to find another choice (become a knight, become an alpha, etc.) before being forced to make THE choice.