Eric Foster is a very strong sixth grader and is seen to act as an enforcer of King Bob's rule at times. He is big, tall and muscular. The only times he speaks is in the episode "King Gus" where King Bob considers him as a temporary replacement but withdraws due to his stature, and in "The Rules" to cease the fighting between the 6th graders and the younger students. He talks with a Philly style accent. His last name "Foster" was revealed in the Episode "The Rules" as Jerome immediately refers to him as "Foster" when giving commands.
Father: Unknown father
Mother: Unknown mother
Friends: TJ Detweiler, Vince LaSSao, Ashley Spinelli, Gretchen Grundler, Mikey Blumberg, Gus Griswald, Randall Weems, Menlo, Miss Finster, Principal Prickly, Miss Grotke, the Ashleys, Scribe Kid, Jordan and Jerome, King Bob and other good Third Street School students
Enemies: Earwin Lawson, Gelman, Conrad Mundy, Greg Skeens, Sue Bob Murphy, Lazy Kid, Chucko Kowalski, Jocko, Buster, Cheay, Koreo and Kurst the Worst
Likes: Working for King Bob and hanging around with Slappy
Dislikes: Troublemakers causing trouble (mainly Lawson), being framed by troublemakers and being picked on by any troublemakers (mainly Lawson), letting King Bob down and any troublemakers disrespecting King Bob