In this regard, the traitorous demons & convict ex-hero is made of the same calibre. They will never understand why they can't agree to their superior's ways, as they're always striving for the opposite ie destruction of order & survivability (in terms of humanity or otherwise). & that's just so stupid & pitiable, but still very much unforgivable. Our MC's servant demon though is lucky to be literally beaten into submission by him & got saved from being obliterated for being a (now former) enemy. She saw what he truly is & therefore she turned loyal, & that's how you truly achieve salvation & freedom. Being a supreme being's servant is her best choice to be able to live on without regrets & endless ignorance.