“A regular foster kid shouts one word and becomes Earth's mightiest hero — but inside, he's still a child.”
Superman-tier strength and durability. Output fluctuates with Billy's emotional state — passion and rage amplify it.
Zeus's lightning at his command — used as an attack, a transformation trigger, and a last resort.
Adult body, child's judgment — wisdom is technically available, but Billy rarely accesses it. The series' biggest running joke.
A 14-year-old orphan trapped inside the world's most powerful body. His difficult childhood could have made him cynical, but it did the opposite — the desperate longing for family kept him warm. Unlimited power plus a child's judgment creates chaos, but that raw honesty is ultimately what makes him a genuine hero.