Denki is a young man with short, blonde hair that has a black lightning symbol on the left side of his fringe. He has slanted, yellow eyes and is rather slimmer than most of his other male classmates. His hero costume consists of a short, black opened fleece with white lightning symbols and matching pants with a utility belt. He has a white shirt underneath and a blue visor that he wears on his eyes. He also wears a disc-shaped pointer Support Item that allows him to aim with his Quirk.