I would be Asai, a 12 year old girl who is a cat princess (she's capable of turning into a cat when she wants) who accidentally marries the Ice King. But she hates the Ice King, so she physically abuses and tortures him!! She's in love with Jake!! 3nodding4laughwheeheart
Valter:A wizard with Elemental powers,He was once a hero,but turned evil when he used a ring that also gave him Immortality.He controls minds of any species to turn them into his soldiers.He is 1500+ years old,One of the survivors of the mushroom war,Known to control a army that has thousands of soldiers.
A mysterious man who has seen the begining and will se the end of time. He is the silent observer and keeps a record of everything that happens. He looks like a man wearing a long black cloak that has a collar that covers his mouth. His skin is a pale blue, his hair is black and his ees are gold within red
An undead knight who also fought the lich, in the ancient times... He only appears to help Finn and Jake when they face the lich, he knows all lichs weakness but he soul is trapped on earth cuz of that