@mekrabbat ... LOL. You beat me to the punch, I was just about to say something similar.
Take it from me guys ... don't fuck a corpse. Even if she is a soul barely inhabiting a body that regularly pops out of her body. Also, don't fuck ghosts. You can never explain to the authorities what you are doing and in most cases you WILL end up in jail. Not speaking from experience or anything ... (> - _ -)> ... <( - _ - )> ... <( - _ -<)
survive (as much as a living corpse would). Frankly, this whole "you-have-to-screw-Karen-to-make-her-pass-on-with-no-regrets" thing seems to be a contrivance of Greenhair's. He DEFINITELY seems to have an angle, and I don't see why Nakamichi is still interacting with that bastard.
That said, I'm willing to bet that Karen can persist in some way; to begin with, Karen has never taken energy from Nakamichi the way that shorthaired annoyance (that ugly face she showed in the other chapter is her true face, to me) did--and that annoyance persists to this day unhindered, with no signs of weakening or diminution. She's also able to possess human bodies with no problem, as well.