Who was jt's bully in the red kayak?

Oh, dude, in the book "Red Kayak" by Priscilla Cummings, the character JT's bully is named Digger. He's like the classic bully archetype, you know, always causing trouble and picking on poor JT. So yeah, Digger is the one making JT's life miserable in that red kayak-filled drama.