I think this is a neat crossroads and definitely a tough choice - safety and keeping his promise to leave if things get hairy vs staying to help people (hes basically a doctor now, yeah?) + the people hes met and care about + the scholarly duty involved in being one of the only people with a...
we've been following the slimey boi's pov this whole time so of course he's the protagonist and I support him... but I can kinda see why people wouldn't like the idea of someone stirring up a massive demon lord world war - and maybe they'd be considered an enemy of god for it 🤔