Hayato Ijuin, known professionally as Umibozu, is a formidable sweeper and former mercenary operating in Tokyo. His imposing frame—tall, muscular, bald, and often clad in olive green military attire with black shades—presents a fearsome image. Yet this contrasts sharply with notable vulnerabilities: an intense phobia of cats and extreme shyness around women, frequently triggering visible blushing. The moniker "Umibozu" originated from Ryo Saeba during their first encounters on opposing sides of a Central American civil war, where mutual respect formed despite the conflict. He also operates under the alias "Falcon," derived from the characters in his real name. His combat mastery focuses on heavy weaponry and guerilla tactics, favoring bazookas, German MG42 machine guns, Stielhandgranate grenades, and his signature Smith & Wesson Model 29 revolver, typically transported in a Toyota Land Cruiser 60. After leaving mercenary work, Umibozu established the Cats Eye Cafe. He later sustained an optic nerve injury causing permanent blindness but retained significant combat skill and continued managing the cafe. His relationship with Miki evolved from rescuing her as a war orphan and training her in self-defense, to attempting to distance her from his dangerous life by leaving her behind. She pursued him to Japan, and they eventually married, jointly operating the cafe post-injury. His dynamic with Ryo Saeba blends rivalry and deep camaraderie, forged through shared wartime experiences and subsequent Tokyo partnership. Umibozu harbored no resentment toward Ryo over the incident causing his blindness, accepting it as an occupational hazard. The character appears in the spin-off *Angel Heart* within a parallel universe. In *City Hunter: Shinjuku Private Eyes*, Umibozu appears alongside Miki, maintaining his role as cafe owner and occasional ally to Ryo Saeba and Kaori Makimura during their mission to protect a targeted model. His portrayal remains consistent—leveraging tactical expertise despite blindness and exhibiting his characteristic reserved demeanor.