Kineshi Hairo acts as class representative at PK Academy, radiating intense energy and passion. He possesses exceptional athleticism, constantly engaging in sports and physical activities while urging others to give their all. His distinctive appearance features bright red hair, a perpetually worn nasal strip, and frequently suffers comedic mishaps where his shorts fall down, revealing his buttocks. His name originates from "pyrokinesis" (パイロキネシス), reflecting anomalous body heat that manifests physically—melting nearby snow or acting as a human heater in cold environments. Unofficial interpretations suggest his nasal strip mitigates sinus inflammation potentially caused by internal heat, speculating about latent pyrokinetic abilities, though these remain unconfirmed. No official media provides concrete information on his family background or early life. Fan theories speculate about potential familial loss or disownment possibly linked to psychic abilities, though these lack canonical support. Hairo exhibits a competitive yet principled personality, prioritizing justice, fairness, and collective success. He demonstrates leadership through organizing events and motivating peers, though his intensity can lead to stubbornness or overexertion. Psychological analyses categorize him as an ESFJ personality type with Enneagram 8 traits, emphasizing sociability, responsibility, and a confrontational streak when defending his values. Notably, he remains unaffected by Teruhashi Kokomi's beauty due to his "pure eyes," which perceive all individuals equally. His dynamic with Riki Nendou forms a significant arc. Hairo initially expresses admiration for Nendou's physical strength and principles during a lifeguard incident, with Saiki overhearing Hairo's internal monologue stating, "I’ve fallen for your principles in life!" This evolves into a one-sided rivalry where Hairo frequently challenges Nendou in athletic competitions, praising him as a "genius" and "powerful rival." Valentine’s Day episodes imply potential romantic tension; Kaidou and Kuboyasu question Hairo's sexuality after observing his interactions with Nendou, including remarks like "Nendou has a nice body" and a suggestively described sumo match. A "rePSIcled manga" panel features Nendou stating they nearly exposed "their relationship," with Hairo responding he would "come out" for Nendou’s sake—though the canonicity of this exchange is ambiguous. Hairo’s development retains his core enthusiasm while subtly acknowledging deeper complexities. His relentless motivation occasionally borders on self-destructive, such as ignoring injuries until momentarily incapacitated, though he quickly resumes strenuous activities. The narrative never confirms or denies fan theories about depression, suicidality, or pyrokinetic powers, leaving these elements open to interpretation. His role consistently emphasizes group cohesion and moral integrity across all seasons, films, and spin-offs.