Bobbi Jean Piper is a first grader at "Clarence somebody or other" elementary. She only appeared in the book "at last" and befriended grace. Grace and Junie b are no longer friends. They haven't talked since. Bobbi jean piper seems to be mean to Junie b as of Mr woo telling Junie b to sit down and she teased her causing Junie b to shout " bobbi jean piper wears a diaper"