Ritsu Kageyama is a key character in the anime series Mob Psycho 100. He is the younger brother of the protagonist, Shigeo "Mob" Kageyama. Unlike Mob, Ritsu initially struggles with feelings of inferiority due to his lack of psychic powers. However, as the series progresses, Ritsu discovers his own psychic abilities, which greatly impact his relationship with Mob and his self-identity. Intelligent and composed, Ritsu is a student council member and is deeply concerned about his brother's well-being, making him a crucial ally in Mob's journey.