Hanzo is a very large and thickset man. He wears a yellow mask over his face that only exposes his eyes, and has a skull design on the forehead. He also wears a yellow kimono with shuriken designs on it and a light green scarf around his neck, and his entire body below his head appears to be covered in dark green netting.
Like the other members of the Orochi Oniwabanshu, Hanzo is loyal to the shogun Orochi and is dedicated to his job. While appearing calm most of the time he is on the job, he became gripped by fear when he encountered the renowned kunoichi Shinobu.
Abilities and Powers
Despite his large size, Hanzo is extremely acrobatic, and spends most of his time hanging and crawling on the ceiling. As a member of the Orochi Oniwabanshu, Hanzo is an extremely skilled ninja, having snuck up on Nico Robin with his comrades, sneaking through Orochi's banquet hall without attracting attention (although he was noticed by Robin), and sneaking up on Nami and Shinobu in the attic of Orochi Castle.
Hanzo wields a grappling hook rope and is skilled in using it, as seen when he used it to restrain Robin's body double extremely quickly. He also carries a sword on his back.
In the anime, Hanzo was part of the Kozuki Family Oniwabanshu. 20 years ago, Hanzo was present in the Flower Capital to witness Kozuki Oden's execution. When Shinobu began telling the truth behind Oden's foolish behavior, the Oniwabanshu appeared behind her and stopped her talking.
Wano Country Arc
After seeing the geisha Nico Robin suspiciously sneaking around Orochi Castle during Orochi's banquet, Hanzo and the rest of the Orochi Oniwabanshu snuck up on her body double and cornered her in a room. When Robin's body double claimed to be Ushimitsu Kozo, Hanzo restrained her with a rope as the Oniwabanshu moved in to attack, but the body double then disappeared. Fukurokuju sent the Oniwabanshu to look for the real Robin, and Hanzo crawled on the ceiling of the banquet hall and looked around.
He eventually crawled into the space above the ceiling and caught Nami and Shinobu peeking into the hall. He correctly identified Shinobu at first, but then doubted it was her because she was no longer as beautiful. Outraged, Shinobu threw a projectile into his groin, which incapacitated him. Shinobu then broke through the floor, causing Hanzo to fall into the banquet hall below.
After Queen unleashed the Ice Oni virus, Hanzo and his allies found themselves under attack by those infected.
When the little Hyogoro, infected with the Ice Oni, again became the former boss of the yakuza, which he did in his youth, the Orochi Oniwabanshu were amazed at this fact, asking what happened to him and how the old man became the one Kaidou wanted to get on his team.