Theodore Jasper "T.J." Detweiler is one of the main protagonist of Recess. He is the ringleader of his five best friends who he spends most of his time with. TJ is known for his sense of rightiousness, justice and the ability to make a plan that will ensure days at Third Street School are never boring.
Father: Samuel "Sam" Detweiler
Mother: Ellie Detweiler
Older Sister: Rebecca "Becky" Detweiler
Friends: 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: Pulling Pranks, solving problems, playing kickball, Senor Fusion comics, hanging out with friends (mainly Spinelli), and recess
Dislikes: Detention, loneliness, no recess, troublemakers causing trouble (mainly Lawson) and being framed by troublemakers