Mr. Johnson

Mr. Johnson is the school custodian at Abbott Elementary, and he treats the building like his personal kingdom, complete with side hustles run out of supply closets and mop carts. He drifts around the halls with an air of weary omniscience, dispensing blunt opinions and dodging actual work whenever possible.

William Stanford Davis plays him with a deadpan that suggests he has seen every teacher come and go and finds none of it surprising. The show uses him as a wildcard who punctures the earnestness of the classroom scenes, and his entrepreneurial schemes are funnier for how seriously he takes them.