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 is very playful and mischievous, along with teasing and sarcastic. He deeply cares for his kingdom and villagers, being the prince of the Light Kingdom. He's very patient and understanding. His quirk is electricity.