Fallen Archangel Kayn.
I desperately need him.
Like- I imagine him with four big, and slightly fluffy at the eblows, black condor wings.
When he gets emotional his halo appears above his head, slowly and eternally crumbling.
He made a deal with Rhaast and shares a body with Rhaast so he fell.
(Secretly, lower ranked regular Angel Ez is following him on a little cloud, watching him because he never got the courage to talk to him while he was in the Heavens. (It's not so secret. Kayn knows.))