Ritsu Kageyama, younger brother of Shigeo Kageyama, emerges as a high-achieving middle schooler excelling academically, athletically, and in student council duties. Beneath this polished facade simmers resentment toward Shigeo’s natural psychic talents, rooted in a childhood accident where Shigeo’s uncontrolled powers injured him. Viewing psychic ability as an unreachable edge, Ritsu dismisses his own accomplishments as hollow compared to his brother’s gifts, fueling a rivalry interwoven with reluctant admiration.
Driven by this envy, Ritsu allies with the Awakening Lab, manipulating delinquents during the Big Cleanup to unlock psychic potential. His latent abilities surface through Dimple, a weakened spirit who mentors him in energy manipulation. Empowered yet unmoored, Ritsu grows merciless—crushing gang opponents and lashing out at Shigeo—until Claw’s 7th Division captures him. Witnessing Shigeo’s unwavering forgiveness and appreciation for his non-esper strengths shatters his arrogance, sparking self-reflection.
Post-capture, Ritsu shifts toward empathy and teamwork. He partners with Sho Suzuki to thwart Claw’s worldwide schemes, showcasing tactical ingenuity. His bond with Shigeo strengthens as he shoulders domestic duties to support his brother’s dual life as student and esper. Further growth emerges through accountability: apologizing to Big Cleanup victims and empathizing with Sho’s fractured family ties.
Ritsu’s psychic toolkit—telekinesis, energy barriers, and a draining “100%” power surge—prioritizes pragmatic combat, exploiting surroundings with calculated precision. His blue-hued aura contrasts Shigeo’s, and while formidable, his skills lag behind espers like Teruki Hanazawa.
Privately introspective, Ritsu journals his solitude and secretly favors human-driven films while disdaining pork feet. His aloof demeanor unintentionally cultivates a discreet admirers’ circle. Through layered struggles, he sheds self-doubt imposed by comparisons to Shigeo, transforms envy into solidarity, and carves an identity untethered from external validation.