Master Owl

Master Owl (or sometimes Professor Owl) was Calimero's teacher from the original shorts up through the 1992 anime series. He is a purple and gray owl and was easily upset by Calimero's inadvertent screw-ups in the original shorts. He did not wear clothes in the original shorts or in the 1972 series (except for a bow-tie sometimes), but in the 1992 series , he wears a suit.

Calimero has a different teacher in the 2013 series because he and his parents moved to a new town.