Ritsu Kageyama, the younger brother of Shigeo "Mob" Kageyama, attends Salt Middle School as a second-year student. He possesses black hair slightly longer than Mob's, with more expressive eyes and larger irises, and stands a little taller despite being younger. His school uniform is a black gakuran tsume-eri featuring a standing collar buttoned top to bottom. Academically gifted and athletic, Ritsu serves on the student council and excels in sports, placing ninth in his school's marathon. He maintains a diary as a hobby, prefers tofu and boiled pork, and avoids pork feet. Generally serious, he exhibits occasional jumpiness. Initially lacking psychic abilities, he harbored significant envy towards his admired yet feared brother, whose uncontrollable power left Ritsu feeling defenseless in conflicts and prevented typical sibling interactions. His longing for psychic powers stemmed from a deeper desire to overcome perceived inadequacies and establish an identity beyond academic success. Ritsu's psychic powers manifested during the "Big Cleanup Arc." Participating in immoral acts like evidence planting under Shinji Kamuro's direction, his accumulated guilt triggered his awakening. He allowed the spirit Dimple to possess him, leveraging Dimple's influence to channel latent abilities, enabling telekinesis, bending spoons, and defeating delinquents. His powers initially amplified ruthless tendencies, leading to violent confrontations and a declaration ending his relationship with Mob—though Mob recognized this as deception. After being kidnapped and rescued, Mob's heartfelt praise for Ritsu's intelligence and unwavering admiration mended their bond, allowing Ritsu to accept that psychic abilities alone do not define worth. His abilities include proficient telekinesis and barrier creation, marked by a blue psychic aura. Initially reliant on Dimple, he later operated independently, though still less powerful than espers like Teruki Hanazawa or Sho Suzuki. He possesses a "Ritsu 100%" state, analogous to Mob's explosion mechanic, granting temporary immense power at the cost of exhaustion. Unlike Mob, he deems psychic violence acceptable when necessary. In the "7th Division Arc," Ritsu and allies escaped Claw's facility, where he confronted Sho Suzuki and was subsequently overpowered. During the "World Domination Arc," he assisted Sho in opposing Claw's leader, Toichiro Suzuki. His character evolved to empathize with others, notably Sho, reflecting a growing understanding of connection and protection. He reconciled with past victims of the Big Cleanup, including a direct apology to Tenga Onigawara. Key quotes illustrate his mindset: "In order to grow up" encapsulates his drive for self-reinvention; "I do not accept losing to anyone besides my big brother" underscores his complex rivalry-turned-respect for Mob; "Because I've lost my limits. I've obtained loss!" reflects his embrace of vulnerability during transformation.