I wonder how the author plans to resolve the whole thing of demons being irredeemable murderers?
Cause clearly the protag's power to charm them does not actually stop them from doing their evil deeds at all.
Will he have to fight them as villains?
I get it. They're a different species and shouldn't be compared to humans. What seems like irredeemable murder to you is us killing chicken.
Same way they may see humans killing goblins as irredeemable pointless murder.
I don't think they need to humanise them just make them tolerate each other. There will always be power differences even if they socially are on the same standing.
Which is just... something that fantasy does. Humans number one. Despite the fact beastmen are stronger in every way elves are smarter in every way demons are better at magic they all live longer they have better battle tactics there's more of them etc...
But human fuk good der for dey best!
Sorry for ramblin at the end