John

4th Grade Male Rabbit is an unnamed fourth grader. Nothing is known about this character other then he is a fourth grade and was in the same kindergarten class as Prunella as shown in the episode Brain's Shocking Secret. He has been used as a background character most of the time and is seen walking around the hallways, at lunch, or at the playground.

Sometimes he is substituted for Steve, but appears to not be related to Steve or Steve's sister Maria in any way, but most likely might be a friend though.

He has been seeing hanging out with both third graders and fourth graders alike. His personality is a mystery though he appears to be nice to the other kids and he has yet to have a speaking role in the series.

Appearance
4th Grade Male Rabbit is a white colored rabbit that wears a light orange collared shirt with long sleeves, dark cream colored khakis, his very noticeable red suspenders, and cream colored shoes. He also wears glasses just like Steve does and has a blue backpack

In The Blackout, his winter attire consists of a chestnut brown coat and a blue scarf.

Trivia

 * This character may have a little sister. His sister's name is Lisa.