I'm honestly more for the big brother aspect now hat I think on it.
Maybe Finn going for Ice princess or Huntress Princess, but again that's delving into shipping and i don't want to start another shit storm.>>103837660
So he sorta tricks he rinto thinking he's a nice guy, but is actually maybe like, a evil wizard dude trying to get the liches secrets to be a cool Necromancer. they find out and send him packing, but befor ehe leaves he's like "Lich, please I beg of you, give me your secrets!"
And the lich just does it, cause all Ash had to do was ask. Thus creating a future antogonist that is actually a semi threat.