User blog comment:G-Monster/Pure Evil Proposal Demise/@comment-24097388-20200203065912

Demise doesn't have any sense of honor. He threw that away the moment he swore his hatred would continue to haunt Link and Zelda's desendants for eternity.

For those saying Demise lacks a moral agency, it's only implied that he's a being made from a source of evil and that he is an incarnation of that said evil. It's not something that's fully explained and more looked into the games though. A lot of it relies on heavy headcanon.

I'm gonna say yes, though if someone can present me a convincing argument, I'll likely change my vote.