This article is a stub. You can help the Milo Murphy's Law Wiki by expanding it.
Fred, also known as The Great Key-Keeper, is the janitor of Jefferson County Middle School who appears in "The Math Book." Milo, Melissa, and some other students apparently regard him as a somewhat mythic figure who sends students on "quests" which may help them with a problem.
He resembles actor Pat Morita, best known as Mr. Miyagi from The Karate Kid movies.