Question for anyone who knows the setting better: would it be possible to play a 'Everfree-Wraith-In-Progress'? I assume the turning into wraith takes a longer while, with growing all the extra parts, and I was wondering would it be possible to have character chicken out halfway (due to some unexpected part of the process, for example) and run away. 

Full-on wraiths don't seem like playable characters, but I was considering a pony halfway there, struggling with Forest's influence, who seen too much and decided it's time to put an end to the madness.