Shun Kaidou, a high school student at PK Academy, bears a name rooted in *shunkan idō* (teleportation), mirroring his chuunibyou persona as "The Jet-Black Wings." Born October 3 under Libra with AB blood type, his 159 cm frame sports light-blue spiky hair, crimson eyes, and red arm bandages symbolically restraining his imagined powers. Formerly a glasses-wearing, socially isolated middle schooler, Shun reinvented himself after meeting Mineo Nobuaki, a chuunibyou mentor who shaped his delusional battle against the fictional "Dark Reunion." He claims his right arm harbors "Black Beat," a power stolen from this organization, and weaves an origin story where his mother’s womb hosted the soul of a rebel assassin. Driven by maternal strictness to excel academically, he struggles with physical activities and practical tasks. His bravado often unravels into comedic failures—falsely claiming credit for events or panicking in danger—though rare acts of courage, like shielding a classmate from a snake, surface. Resolution typically relies on others, such as Kusuo Saiki. Kuboyasu Aren addresses him familiarly, while his brother Toki naively believes his tales. Mocked as "Chihuahua-kun" by peers and infantilized by his mother’s nicknames like "Shun Baby," he remains oblivious to Yumehara Chiyo’s romantic interest. Chapter 221 outlines his fractured personas—"Destructive Jin," "Villainous Mei," "Lawful Kai"—each reflecting internal conflicts and a thirst for validation. Despite fleeting self-awareness, he clings to fantasies, tolerated by peers. Trivia notes a chihuahua guardian spirit, a salami preference, and theme songs like *Judgment Knights of Thunder*. His appearance parallels *Gintama*’s Sakata Gintoki, sharing wavy hair and red eyes.