Shōshō Akatsuka appears as the toddler sibling of Taisho, introduced in the first anime adaptation. This young child can speak but cannot walk independently, relying on rides atop the family cat, Dora, for mobility. His primary narrative role involves accompanying Taisho as a constant companion and sidekick, especially when other children are not present.

The name "Shōshō" functions exclusively as a nickname or title. It translates to "Major General," a direct reference to his older brother's designation as "The General" (Taisho). While the 1988 anime adaptation reveals Taisho's full name as Daisaku Akatsuka, Shōshō's formal given name remains undisclosed across all documented media.

His core character design and function as Taisho's toddler brother dependent on Dora persist unchanged throughout subsequent anime adaptations in 1988 and 1998. The character exhibits no significant evolution or expanded backstory across television series, films, or other official media. Information concerning his presence or role in spin-offs, OVAs, or the live-action film is unavailable.