Margaret

Margaret is a red-breasted robin who works as a waitress at the coffee shop across the street from the park. Mordecai has a huge crush on her and is always finding ways to make excuses to go to the coffee shop she works at to see her. When she tells Mordecai that she is going to see Fist Pump, he is then motivated to raise money with Rigby to get tickets. She is in a relationship with a human, Slasher, although they may not be in a relationship anymore because of her negative reaction towards him at the end of the episode (Caffeinated Concert Tickets).

Trivia

 * Currently, she is the only female character on the show.
 * Her only appearance so far is in the episode Caffeinated Concert Tickets.
 * In "Meat Your Maker" she shows up again in Mordecai dream when he was unconscious