[Well... Husk gave this person an out and they elected to ignore it and continue talking about it. Bartenders must have that effect on people.]

I'm not too knowledgeable on the biology of angel and demon hybrids in your home, so there's a huge chance I could be talking out of my ass on this, but maybe the injuries didn't heal properly.

I know in my hell, when sinners get attacked or ripped apart or blasted to fucking pieces, we're able to slowly regenerate and recover. The only thing that can kill our immortal souls for good is angelic weaponry.