Satoru Gojou is the first-year teacher at Tokyo Metropolitan Magic Technical College. When interacting with his students and friends, he is known to be quite playful and carefree. However, toward his enemies, he has shown to be quite cruel and rebellious. He is also very confident in his abilities and reputation as a powerful sorcerer. (Source: Jujutsu Kaisen Wiki, edited)

Hachiman is the story's main protagonist, an isolated, friendless boy who is pragmatic to a fault. His most prominent feature is his set of "dead fish-eyes." He firmly believes that "youth" is simply an illusion created by hypocrites, for hypocrites, born from the ashes of past failures. In this state of apparent corruption, he is coerced into joining the Service Club by his futures advisor in the hopes that exposing him to the world will change his personality, and ultimately make him a "better person." He is called "Hikki" affectionately by Yui. (Source: Vistrans, Yahari Wikia)