Tammy Gueterman is a deep-cover agent for the Galactic Federation. She is also, possibly as a disguise, a student at Harry Herpson High School and a friend of Summer Smith. She became engaged to Birdperson and planned a wedding as a ploy to gather as many enemies of the Galactic Federation in one location in order to capture and arrest them. After the fall of the Federation, she became the leader of the remains, and will likely be the show's main villain. She is voiced by Cassie Steele.