Jujutsu Kaisen's strongest soldier, Satoru Gojo, had one best friend as a teenager -- Suguru Geto. The pair make up two of the three Special Grade sorcerers who were recognized at the time. They were absolutely unstoppable together. Gojo and Geto were inseparable as they'd go on missions together, buy each other treats, and spend all their spare time getting under the other's skin. However, all this changes after they fail their most important mission and lose the Star Plasma Vessel, Riko Amanai, to Toji Fushiguro, an assassin.
Source：https://www.cbr.com/jujutsu-kaisen-why-geto-never-ask-gojo-join/
