Operating in secret, the Orochi Oniwabanshu defends Orochi from any potential threats. Being noted by Shinobu as a group of extremely capable ninja, they are masters of Ninjutsu and are capable of moving around in secret to catch intruders by surprise, including the extremely sharp-witted Nico Robin.
Wano Country Arc
The Orochi Oniwabanshu spotted Nico Robin sneaking around Orochi Castle and caught her by surprise inside one of its rooms. The captain Fukurokuju then came in and gave Robin a chance to explain herself. The ninja tried to arrest Robin, but they only attacked a duplicate created by her Devil Fruit powers. The group then dispersed throughout the castle to find her. Daikoku recognized her when she was helping Toko escape.
Some of the other ninjas confronted Robin in the banquet hall, but she was assisted by Brook's spirit form arriving and frightening them, allowing her to easily knock them away with some giant hands. Meanwhile, Hanzo discovered Shinobu and Nami in the space above the ceiling as they were peeking into the hall. Shinobu incapacitated him by throwing a projectile into his groin.
After the Straw Hat Pirates began causing chaos at Rasetsu Town right after Shimotsuki Yasuie's execution, the Orochi Oniwabanshu entered the conflict. Some of them pursued Zoro and Hiyori into a forest, where Zoro cut them down.
- The Orochi Oniwabanshu is most likely based on the Oniwaban, a group of undercover security guards employed by the Japanese shogun in the feudal era.
- The former shogunate also had a group that went by "Kozuki Oniwabanshu" of which Raizo, another ninja, was a member.
- One Piece Manga and Anime — Vol. 92 Chapter 931 (p. 11-13) and Episode 925, The Orochi Oniwabanshu debut.
- One Piece Manga and Anime — Vol. 93 Chapter 932 (p. 3-6, 16-17) and Episodes 926–927.
- One Piece Manga — Vol. 93 Chapter 933 (p. 5-10).
- One Piece Manga — Vol. 94 Chapter 945 (p. 4-5, 7, 10-11).
- One Piece Manga — Vol. 94 Chapter 950 (p. 14-15).
- One Piece Manga — Vol. 95 Chapter 958 (p. 6-7).