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. He's slimmer than most male students in his class, with little visible muscle mass. During the Paranormal Liberation War, Denki gained a scar on his upper left forehead following his injury from Mr. Compress' attack, although his hair covers it rather well.