Height: 161.4 cm

Hanazawa Teruki is an esper who was first introduced as an antagonist, but later became Mob's friend after being defeated by him. He was the shadow leader (urabanchou) of Black Vinegar Middle School, using his psychic powers to rule over the delinquents at his own school, as well as to defeat those from other schools.

Teruki is a talented, quick-thinking, and hardworking esper. In terms of raw power, he is nowhere near Mob's level, but he compensates for this by putting in effort and training diligently. He is able to analyze other espers' techniques and their weaknesses in a short amount of time, and often incorporates said techniques in his own fights. He is constantly training to improve himself, and is remarked by various espers as possessing a keen and powerful set of skills.