Aaron Kelso, known to the Recess Gang and the rest of the Third Street School children as Mr. Kelso, is the friendly local shopkeeper of a corner store named 'Kelso's' which the children visit in numerous episodes. He is kind and often acts as a voice of advice and reason to the kids. His wife seems more interested in money than in advice, as she seems to henpeck Mr. Kelso about turning away business in the name of morality.

Voice: Dallas


Wife: Unknown wife 

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: His job, and helping everyone, especially his wife

Dislikes: Troublemakers stealing everything from his store, especially Mundy, Skeens, Lazy Kid, Kurst and Sue Bob, troublemakers causing trouble (mainly Lawson) and being framed by troublemakers

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