Karen was a lemur who used to be King Julien's girlfriend back in Lemur School. She, however, admitted years later that she was using him for his popularity and was planning to marry him so she could become queen. She tried to kill King Julien for standing up to her at their prom night, but Karl saved him, claiming he was his arch-nemesis to destroy, not Karen's. Karen was later eaten by a foosa when a group of them were running away from Karl's weapon.
She is white lemur with blue eyes. Her left hand is freakishly awful and she wears glove to keep it.
She is deceptive and cruel and wants to get her revenge at King Julien for humiliating her, but it backfires when Karl arrives and ruins everything.