Neito Monoma is a student in Class 1-B at U.A. High School, training to become a professional hero. Standing at 170 cm (5'7"), he has short blond hair parted to the right, with bangs obscuring his right eye. His periwinkle blue eyes remain half-lidded, lending him a perpetually disdainful gaze. His tailored hero costume pairs a black double-breasted tuxedo with ankle-length tails, two belts around the waist—one dangling three clocks—and an upturned shirt collar fastened with a dotted blue tie. A matching handkerchief peeks from the left breast pocket, contrasting sharply against the plain black tailcoat and trousers. White shoes complete the ensemble, later augmented by twin clock-shaped earrings post-graduation. Monoma’s Quirk, “Copy,” enables him to mimic another’s ability for ten minutes upon physical contact. By retaining up to four Quirks simultaneously, he strategically adapts during combat, cycling powers as needed. Driven by a rivalry with Class 1-A rooted in insecurity over his Quirk’s limitations, he frequently taunts them to assert Class 1-B’s prowess. Yet among his peers, he reveals a composed, intellectually sharp demeanor, offering genuine support. His worldview divides individuals into “main” and “side” roles, mirroring his internal struggle to define his significance in heroics. His dorm room blends French elegance with antique white furniture and pastel walls. Adopting the hero name “Phantom Thief,” he embodies the cunning, principled trickster of literary lore. The kanji in his surname (“object” and “gap”) and given name (“repose” and “person”) subtly reflect his complex identity. He shares a birthday with Yo Shindo. During pivotal conflicts like the Final War, Monoma leverages copied abilities such as Kurogiri’s Warp Gate to aid hero efforts. His evolution from a brash rival to a tactical ally underscores his growing maturity and commitment to collective heroism.