Denki has blond hair with black, lightning-shaped streaks and small, thin eyebrows. Denki is somewhat flirtatious with the girls in his class (and even those in other classes), trying to pass himself off as a smooth talker. He doesn't have much luck with his approaches, often being ignored or outright rejected by everyone. He's also a bit mischievous, occasionally engaging in pranks. Overall, it seems that Denki has an interest in looking cool in front of others.