Teruki Hanazawa is a second-year student at Black Vinegar Middle School.
Before meeting Mob, Teru didn't know any other espers, so he greatly overestimated his own importance and power. He was introduced as an antagonist but is now Mob's friend.
Mob Psycho 100 can be compared to its predecessor One Punch Man in how it features down-to-earth protagonists that have been granted immense power. But how does Mob Psycho 100 deal with this premise differently?