Chief Chujo, known as Silent Chujo and The Human Bomb, led the Peking branch of the International Police Organization (IPO) and commanded the Experts of Justice. He belonged to the elite Celestial Nine, the heroic counterpart to the villainous Magnificent Ten. His calm, even-handed demeanor during crises earned him the "Silent" moniker, reflecting his composed leadership. He consistently wore distinctive dark sunglasses, reinforcing his authoritative presence.

As operational commander, he coordinated the Experts of Justice against the terrorist group Big Fire, typically overseeing missions from strategic positions rather than engaging in direct combat, which limited his on-screen action for most of the series. This changed dramatically at the conflict’s climax when confronting the colossal Eye of Volger (Monster Sphere). He prepared to unleash the Big Bang Punch—an ultimate technique channeling immense destructive force through his fists at the fatal cost of his life.

His decision stemmed from profound guilt over perceived inaction during prior catastrophes, particularly the Tragedy of Bashtarle. He intended the Big Bang Punch to halt the weapon and enable his comrades’ retreat. As he initiated the attack against the Eye of Volger, Ginrei’s intervention caused hesitation and a missed strike. Despite this, the punch’s residual force significantly destabilized the machine, highlighting his willingness for self-sacrifice and deep responsibility toward his team.