Denki has short gold hair, parted to the right with a black lightning-shaped streak on the left of his side fringe, which is angled to partially obscure his left eye. He has slanted, somewhat triangular golden eyes and notably small eyebrows. Denki is a friendly, social and energetic boy who enjoys hanging out with others. His quirk is electrification which allowed him to generate electricity and manipulate it to a certain extent, although he still had a long way to go before mastering it.