Baldi is the titular main antagonist of the Baldi's Basics series and the titular main protagonist of the Baldimore comic series. He is the head teacher of both the Schoolhouse and the Super Schoolhouse, giving the player mathematical problems to solve on the You Can Think Pad or one of his several Math Machines before they can collect notebooks. As the game series is not what it first seems, a twist reveals a more sinister side to Baldi's personality when the player makes their first mistake.