In the human world, kids who rebel against their middle class parents reject their nice lifestyle and turn to death metal, dress like goths, hang around with the "wrong" rough crowd, experiment with drugs and booze, get all emo and angsty and angry at the world and fucking hate everything
In the demon world, Tom's trying to rebel and find his identity by blasting uplifting boy band pop while eating cereal (and not proper demonic foods), hanging around with safe kid human Marco Diaz, getting a goddamn fluffy bunny as a pet and naming it Marshmallow, and hiring an anger management counselor in order to become a nice, calm and upstanding person.
Of course he also dresses in ragged skater clothes and gets piercings, he's a teen rebelling against being a prince after all, but it's still kinda amazing. I can sort of picture him getting into charity volunteering just to spite his dad, or something>TOM, GET BACK HERE THIS INSTANT!>NO! I'M GOING TO GO RESCUE SOME KITTENS AT THE ANIMAL SHELTER! IT'S MY LIFE, YOU CAN'T TELL ME WHAT TO DO!