Itejiro Toteki, hero name Boomerang Man, attends Ketsubutsu Academy High School and later becomes a professional hero. As a second-year student in Class 2-2, he advances to his third year and graduates. Physically, he possesses wavy shoulder-length black hair, small oval-shaped eyes, a round nose, and a notably small mouth. He stands 171 cm tall with blood type B. His hero costume features a black shirt with elbow-length sleeves accented by thin pale gray shoulder lines, black capri pants over tights, black sneakers, a wide red scarf covering his chin, and dark red fingerless gloves with thin red wristbands. Born December 20 in Aichi Prefecture, Itejiro exhibits a shy, reserved exterior with introverted body language. He demonstrates confidence in his abilities and graceful performance under pressure. Despite his quiet demeanor, he grows talkative when comfortable and conceals sharp analytical thinking behind a neutral expression. He maintains a polite, apologetic nature even when applying his skills strategically. His Quirk, "Boomerang," grants perfect accuracy and trajectory control over thrown objects, allowing him to manipulate paths mid-air or redirect projectiles underground to bypass defenses. His signature Ultimate Move, "Trajectory: Crescent Moon," hides hardened projectiles underground before curving them unexpectedly toward targets. Another move, "Moon Ring," is noted though less detailed. Official ratings assess his capabilities as Power 3/6, Speed 3/6, Technique 4/6, Wits 5/6, and Control 5/6, emphasizing his precision and strategic skill. During the Provisional Hero License Exam, Itejiro participates as a second-year student in Ketsubutsu Academy’s traditional "Crushing of U.A. High" ambush against U.A.’s Class 1-A. Collaborating with Shikkui Makabe—who hardens projectiles for him—he directs an underground attack toward Class 1-A. Kyoka Jiro counters with Heartbeat Fuzz, forcing the projectiles to surface, where Mina Ashido neutralizes them with Acid Veil. Later, after Yo Shindo’s Tremoring Earth scatters opponents, Itejiro aids in isolating U.A. students, though Shiketsu High students complicate their efforts. Following chaotic clashes, his class passes the first phase by waiting for rivals to exhaust themselves. In the exam’s second phase, focused on disaster rescue, Itejiro and classmates efficiently establish a first aid zone, evacuate civilians, and relocate the injured during an invasion by Gang Orca and makeshift villains. After completing both phases, he obtains his provisional license. He continues at Ketsubutsu Academy for his third year. Following the Final War, he graduates and launches his professional hero career.