Eileen is a humanoid mole with short brown hair tied back. She has red glasses, she has a small light brown tail and a ponytail on the right side of her hair and she does not wear shoes.
She is 22 years old.
She is somewhat shy, although she is also smart, cool, and also kind. She is a worker. She is a born planner, who can succumb to pressure. She also knows how to analyze things, feelings, emotions, she has an eye to see through people.
She is Rigby's girlfriend and Margarita's best friend.