1. Please! Johnny is a very conflicted person, trying not to succumb to the instincts of his demon side. He's... still not a very good person though, but underneath all his bravado and crassness is a lonely and messed up dude. I can always extrapolate more later if needed.

2. Sure, if it comes up, just say so.

3. Sure, it'll makes Johnny flip his lid. :D

4. Oh, most definitely. Johnny is half human, half incubus.