Jenna Morgan is a recurring character in Elwood. She is a cat who attends Lakewood Elementary. She seems shy, but has since developed some friendships with her classmates. Jenna has nocturnal enuresis, and she is lactose intolerant.

Jenna developed anorexia nervosa in The Fat Girl in the Mirror, when Muffy Crosswire and Prunella Deegan convinced her she was fat. After that event, Jenna reduced her diet to only "field greens". She later presented herself before Muffy and Prunella in her new emaciated form. She was once again made fun of, and compared to a skeleton. Jenna seems to have recovered and gotten back to a healthy weight.