So if trolls get butterfly like wings when ascending to God Tier, why don't Cherubs get the wings that adult Cherubs have? Maybe not Caliborn, as he was stunted through early predomination, but Calliope could.

Well, I mean, Adult Trolls don’t get wings, so that would be a false equivalency. They look cool and that’s. Kind of about it. They’re also completely useless since God Tier already allows you to fly with no need for wings. So it’s a purely aesthetic choice.

That being said, they get it because it references Metamorphosis. Their Quest Bed is a Quest Cocoon, that breaks open upon Ascension. It’s like a larva becoming a butterfly, and as such, they get butterfly wings.