A ghoul logged in the CCG's files as suspect Number 696, remembered chiefly as the husband of Ryouko and the father of Hinami. His death left behind a kagune that an investigator later forged into a weapon, while the anime reworks his fate into that of a clinic doctor.
The manga and anime disagree on the small details of how Asaki looked. On the printed page his hair is kept short, while the animated version ties it back into a ponytail. The anime also recasts his role entirely, presenting him as a physician who runs his own clinic rather than a background figure already gone from the story.
In the manga's timeline, Asaki had already died roughly four months ahead of the Steel Beam Incident, sometime before June 10th. All that survived him was a mask kept by his widow, Ryouko. Once he was gone, the investigator Kureo Mado harvested his kagune and shaped it into a quinque named Fueguchi One.
The anime tells a very different story. Still alive and working out of his clinic, Asaki was cornered by the brutish Yakumo Oomori, called Yamori, who forced him to reproduce a broken set of diagonal pliers while Hinami and Ryouko stayed hidden. The moment the work was done, Yamori turned on him, hurling him through a wall and leaving him gravely injured directly in front of Mado and Koutarou Amon. After Yamori slipped past the investigators, Asaki tried to stand his ground against them but was finished off by Mado.
Born a ghoul, Asaki carried the heightened physicality of his kind, and Mado himself remarked that he was quite strong. The fact that he sheltered his family for so long points to genuine capability. His rinkaku kagune resembled a bundled spine and lent itself to fast, cutting strikes.

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Asaki Fueguchi is a ghoul catalogued by the CCG as suspect Number 696. He was the husband of Ryouko Fueguchi and the father of Hinami Fueguchi, and in the manga he had already died before the story's present, leaving behind a kagune that was later forged into the quinque Fueguchi One.
Yes, Asaki Fueguchi is a ghoul with a rinkaku kagune shaped like a bundled spine. Investigator Kureo Mado himself remarked that Asaki was quite strong.
In the manga, Asaki had already died roughly four months before the Steel Beam Incident, sometime before June 10th, leaving only a mask behind for his widow Ryouko. In the anime, he is instead a clinic doctor who is fatally injured by Yamori and then finished off by Kureo Mado.
After Asaki's death, CCG investigator Kureo Mado harvested his kagune and forged it into a quinque named Fueguchi One.
The manga presents Asaki as already dead before the story begins, known only through his kagune. The anime instead makes him a living clinic doctor, forced by the ghoul Yamori to repair a set of pliers before being killed by Kureo Mado in front of Hinami and Ryouko.
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