Denki is a slim teenager with spiky, golden-yellow hair featuring a black, lightning-shaped streak. He has matching yellow eyes. His hero outfit includes a black jacket with lightning patterns, a white shirt, black pants, and a high-tech headset with an optical visor. Denki is an energetic, friendly, and outgoing social butterfly. He loves acting cool and cracking jokes, though he is often the target of playful teasing. Despite his goofy and casual attitude, he is highly supportive, fiercely loyal, and incredibly brave when protecting his friends. His Quirk, Electrification, lets him emit powerful electrical currents from his body to shock enemies. However, he cannot naturally aim his lightning. If he unleashes too much voltage, his brain short-circuits, temporarily turning him into a dazed, helpless idiot for an hour.