He's cowardly and tries to avoid conflict, but has no problems switching his mindset to view other people as nothing more than monsters and deal with them appropriately. That said, he'll probably need to be pushed much further than that before killing someone. Which has happened at least once.
Sorry for the late update everyone. I was feeling burnout and could bring myself to translate. I'm trying to get back on that horse now and want to do 3-5 pages a day in the future