Koganehiko and Shiroganehiko

and, are the Shiba Family's house guards and Kūkaku Shiba's assistants.

Appearance
Both wear a red hat with a gold trim and white tassel on top and a light blue scarf tied at the front by a red fastener with gold highlights. Shiroganehiko wears a yellow top, while Koganehiko wears a white one. The only notable differences between Koganehiko and Shiroganehiko apart from the differing colour of 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.

Personality
Koganehiko and Shiroganehiko are very loyal characters to the Shiba clan and their affiliates. They are easily upset by disappointment from Kukaku and Ganju, but are very hard workers, doing the work that Kūkaku gives them flawlessly and without complaint or resistance.

History
They have been guards at the Shiba house for a long time, as seen when they instantly recognized Yoruichi Shihōin in her feline form even though she had not set foot in Soul Society in 100 years. The pair previously were Kūkaku and Kaien Shiba's educators. Since the fall of the Shiba clan, they are the only people who continue to serve the family.

Soul Society arc
They first appear when Ichigo Kurosaki and his group visit Shiba Kūkaku. When Ichigo and the rest of his group arrive at Kukaku's house, the brothers approach them, saying that "they look suspicious and that they definitely not allow them to pass." Ichigo grabs for his sword, but before he can attack, Yoruichi appears. Koganehiko and Shiroganehiko recognize the cat, and let them pass, immediatly. Later, the brothers help Ichigo, Chad, Ishida, and Orihime with their training to form a cannonball for the Kukaku Cannon.