Johnny is a quite outgoing person and usually has a lot of energy. He can be rather brash sometimes and also a little reckless. However, he's overall kind and honest, especially with his inner circle. His sense of humor is relatively sarcastic yet also flirty and slightly cocky. He's very protective over those he cares about and is a bit spontaneous and impulsive.
After being exposed to cosmic radiation during a space trip, he gained the ability to fly and generate fire, usually his whole body.