Sonia Lewis is a minor character in Monsters University, and a member of Eta Hiss Hiss. She is a light blue monster with two antenna eyes, freckles and dark blue hair. She is always seen together with her sorority sisters.
As mentioned before, Sonia is always seen next to her sisters. She is first seen at the first party at the Jaws Theta Chi fraternity house. At the second party, she is seen dancing slowly with her sorority friends. When the Roar Omega Roar members humiliate the Oozma Kappa members, she is seen laughing along with the rest of the fraternities and sororities of the Scare Program.