Wendy is one of the three ghosts in the episode "Heat Signature." Wendy was the only female ghost of the group, and Wendy was in a gang with Marceline in the past. With Booboo and Georgy, Booboo helps Marceline prank Finn and Jake into thinking that they are vampires. Though, unlike Marceline, Wendy with her two ghost friends take it too far and try to kill Finn and Jake. She lives in 25 Blood Drive, along with Booboo and Georgy.