Karen is a lemur who used to be King Julien's girlfriend back in Lemur School in "All Hail King Julien." She however admitted years later that she was using him for his popularity and was planning him so she could become queen. She tried to kill King Julien for standing her up on prom night, but Karl saved him, because she claimed he was HIS arch-nemesis to destroy, and not Karen's. Karen was later eaten by a fossa as a group of them were running away from Karl's weapon.