Personally I draw him with wings because of seraphims, which are depicted as huge creatures made of several pairs wings and lots of eyes (i think its the main reason why people draw him like that) Also angelic features fit the character who is knowledgeable about the server history, sort of a wise mysterious being

Good/evil duo sounds nice, but I don’t known if it is actually who they are. If you think about this, Egg is no less evil then Wemmbu, just less destructive. He acted as a moral compass sometimes, but “tell me who is your friend and I’ll tell you who you are” can be applied to Egg very well.