"Humpty" is a nickname Bobby gave him on account of his weight, derived from the nursery rhyme Humpty Dumpty.
Humpty is a pudgy tween with light blond hair, and wears a black polo and tan trousers.
Humpty is bit of a worrier, though he is brave enough to join Bobby on his stowaway caper—and like his friends, not afraid to call Bobby out on what a harebrained idea the caper is, though he has by and large resigned himself to Bobby's lack of foresight.
To be added.
- Though Humpty is technically drawn on the cover of The Rolling Bootlegs/Epilogue...1, he does not make his official debut until the twelfth novel.