Gary, or Gary the Mermaid Queen, appears in “The Witch’s Garden. She looks a lot like a skeleton crossed with a woman rather than a mermaid. She lives in the river of junk and, like in the legends, mates with the males she finds, these ones being Finn and Jake. Finn calls her “the grosses thing I have ever seen”. This is why Gary feeds him to her Hatchlings. Near the end of the episode, Jake gives her a massive kiss, causing her to fall into the river of junk.