Ash

Ash is Marceline's ex-boyfriend, and appears in "Memory of a Memory". Marceline broke up with him because he sold Hambo, her favorite teddy bear. Disguised as a Rag Wizard, he used Finn and Jake to get ahold of Marceline's memory core containing her memory of dumping him so that he could destroy it, effectively making it like the memory never happened for her. As Marceline wakes up he and Marceline go to his house where he asks Marceline to make him dinner then she finds out what happened from Finn and Jake, Marceline comes out of his house with Finn and Jake and they start to beat him up while Jake stretches to a giant size and stomps on him. It's unknown if he survived.

Rag Wizard
The "Rag Wizard" is a fake personality Ash came up with to trick Finn and Jake. This disguise has a beard with the end tied. His clothes are made of rags, making him look more like a hobo than a wizard. He allegedly had no arms, and thus used his feet to interact with things. He claimed that he was Marceline's "spirit animal". As soon as Finn and Jake find the memory of Ash and Marceline breaking up he later on he reveals that he is really Ash.

Appearance
Like Marceline, Ash has pointy ears and bluish-gray skin, even though he is not a vampire. He has a white mohawk-like wisp of hair, similar to the hair style Marceline had in the episode "Go With Me?". He always carries a pouch of Magic Powder on his belt, both as himself and in disguise as the Rag Wizard.

Personality
Although Ash appears to be a nice guy in Marceline's first memory of moving into the Tree Fort, he soon reveals himself to be inconsiderate, cruel and sexist. Ash also sold Marceline's childhood toy Hambo, to a witch, knowing that it was very important to her. After stealing Marceline's memory, he orders her to make him a turkey sandwich (with tomato and pickles) and says he wanted her in the kitchen making it. Ash is arrogant and appears to dislike "mere mortals," as he told Marceline he doesn't want her to spend time with Finn and Jake.

Trivia

 * Adam Muto confirms that he is a wizard, not an undead creature.
 * Ash seems to treat Marceline like a maid.
 * Marceline knew him a long time before Finn and Jake.

Quotes
See Ash/Quotes