Koganehiko and Shiroganehiko

and, are the Shiba's house guards and Kūkaku Shiba's assistants. They appear to be twins. The only notable differences between Koganehiko and Shiroganehiko apart from their clothes are some features of their faces; Koganehiko has a broad face and split chin, while Shiroganehiko has a long face and a normal chin. Like Ganju's underlings, they are very shallow but loyal characters. It also seems that they have been guards at the Shiba house for a long time as seen when they had instantly recognized Yoruichi Shihōin in her feline form even though she had not set foot in Soul Society in 100 years. The pair were previously the educators of Kūkaku and her elder brother Kaien Shiba. Since the fall of the Shiba clan, they are the only people who continue to serve the family.

