Jesse is a Shlorpian, a species of alien which originates from a planet called Shlorp. She has a primarily light green complexion, save for a few dark green speckles on her forehead. Jesse is usually seen wearing a pink dress with white polka dots, white slip-on shoes, and a reddish bow atop her head. She is the only female in her family; a fact which becomes relevant in "The P.A.T.R.I.C.I.A. Device", wherein she has to do a project for school on women's rights.
Unlike Yumyulack, she is optimistic, free-spirited, and compassionate, much like Terry. Jesse enjoys talking to people and finding the positive attributes of life on Earth.