Baldi is a supporting character who first appeared in Annoying Orange vs Baldi and in a part of the Stories as a teacher. He teaches math. Baldi has appeared many times as a main character on the Annoying Orange Gaming channel and in many challenge videos. Baldi occasionally takes Pear's place in HOW-2 videos. he often guest stars on videos, like Baldi looks hilarious in the faceapp challenge or several ask oranges, and even an untitled goose gameplay video. According to Orange He always running around spank people to their butts with a ruler.
In the Baldi's Spooky Math Challenge, Baldi asked the questions. Either Grapefruit or Midget Apple guess it wrong, they'll have to spin the punishment wheel. Grapefruit got the answer wrong and spin the punishment wheel to heinie whaps twice. Grapefruit quits the game until got the question right of infinity heanie whaps and gets another heinie whaps.
in Ask Orange episode 62 it is discovered that baldi's enemy is FRED and he does not like to be screamed at, like pear he gets really annoyed when things are dropped on him
In Ask Orange episode 64, when Orange closed his eyes, Baldi spanking Orange and the gang as well spanking the TNT caused them to exploded.