Minori Asagiri

Minori Asagiri is a middle-school girl and the daughter of a wealthy businessman.

Asagiri is very spoiled and very cruel. The first we see of her, she throws a tantrum due to dissatisfaction over lavish birthday presents. This is her true personality, according to her father, that existed before she was possessed by Mogami. Within the world Mogami created and trapped Mob in, she acts very similarly. She bullies, isolates and abuses Mob. Apparently, she does this because she wants to prove herself superior, and by preying on those who are weaker and can't stand up for themselves, she establishes her position. However, after being saved by Mob, she is brought to tears and resolves to become a better person because of him.

(Source: Mob Psycho 100 Wiki)