it's me again with another question about dead characters. i'm sorry.

This Time It's An OC, specifically an OC who is a ghost - is being apped as a ghost viable? His default state is a spectral, semi-tangible form that floats a little, while he can use powers to magic himself totally invisible/intangible or alchemize up a temporary golem body to possess. These ones would be regains obviously, so I am wondering if the ghostly form would be viable in play...