Well at this point, my Warlock has an enemy for almost each season, them being an Eladrin
Spring has this situation, where some servant of the archdevil knows her face
Summer has a Lich Queen who has his portrait from a ghost who saw him during a heist of her library
Autumn’s issue is she trapped a Dracolich in the astral sea with no way back on her own
Winter is the only one sitting pretty, with the only big name attached to his face being that the Winter Queen adores him as much as she does all children of winter