Shirakaba is one of Akakabuto's many sons and Monsoon's brother.
When bears find the Ou army has fled from prison, Bob leaves with Shirakaba in search of them. Bob finds the dogs and begins spying on them from the bushes, but Kawasemi finds him, forcing him to back off. Shirakaba is hiding behind a tree and wonders why Bob just runs away, and he appears in front of the dogs. Bob tells Shirakaba to back off, because there are too many dogs, but Shirakaba is hungry and wants to kill so he can eat. At that moment, Akame arrives with his scythe, and in a flash strikes Shirakaba in the neck, slitting it open. The bear dies instantly.