The Orochi Oniwabanshu are a squad of ninjas who directly serve Kurozumi Orochi, the shogun of Wano Country.
Operating in secret, the Orochi Oniwabanshu defends Orochi from any potential threats. Being noted by Shinobu as extremely capable ninjas, they are masters of ninjutsu and are capable of moving around in secret to catch intruders by surprise.
The Orochi Oniwabanshu are likely based on the Oniwaban, a group of undercover security guards employed by the Japanese shogun in the feudal era.
Their captain is Fukurokuju, a tall man with an elongated bald head. He has a very long and pointed dark beard, and his earlobes are extremely long. He wears a dark kimono with a pattern of circles with three dots in them, as well a Japanese character on his abdomen.
Fukurokuju is the name of one of the Seven Lucky Gods in Japanese mythology. Like the other Seven Lucky Gods, he has an elongated head.