Ritsu Kageyama, younger brother of Shigeo "Mob" Kageyama, navigates life as a second-year Salt Middle School student celebrated for his academic prowess, athletic skill, and poised leadership on the student council. Beneath this polished exterior simmers a gnawing inferiority toward his brother, fueled by Mob’s natural psychic talents—a realm Ritsu once believed effort could never unlock. His fixation on psychic power as the ultimate measure of worth spirals into envy and frustration, shaping his early struggles. The ethical compromises of the student council’s Big Cleanup plan, including evidence tampering, ignite Ritsu’s latent psychic abilities through guilt and desperation. Temporarily possessed by the spirit Dimple, he masters telekinesis and barrier creation, his blue-hued powers growing independent of external aid. Though formidable, his abilities pale against espers like Teruki Hanazawa or Sho Suzuki, the latter defeating him yet recognizing his raw potential. Newly empowered, Ritsu embraces ruthlessness, brutalizing delinquents and lashing out at Mob, convinced strength legitimizes cruelty. This philosophy shatters during captivity under Claw’s 7th Division, where Mob’s steadfast kindness and admiration for Ritsu’s non-psychic virtues—intelligence, moral resolve—spark a reckoning. Their tear-streaked reconciliation mends fractures, redirecting Ritsu’s envy into mutual respect. Later arcs reveal Ritsu’s matured empathy and tactical ingenuity, aiding Sho Suzuki in thwarting Claw’s Toichiro while bonding over shared protective instincts for family. He occasionally accesses a volatile "100%" power state mirroring Mob’s explosive potential, though physical toll limits its use. Privately, Ritsu documents his thoughts in a diary, favors tofu and boiled pork meals, and avoids music despite an appreciation for human-centric films. Interactions with allies like Teru and Reigen expose a pragmatic, guarded exterior gradually softened by collaboration. Though early choices flirt with moral gray areas, his devotion to Mob remains an unwavering anchor, steering him through darkness toward growth.