Tarou appears across the *Dr. Slump* manga and its adaptations as the wealthy son of Penguin Village's richest family. His family's affluence grants him access to elite schools and a privileged lifestyle, often contrasting sharply with the eccentric and less fortunate residents like Senbei Norimaki. This economic disparity fuels comedic rivalry, with Senbei viewing Tarou's family with resentment and envy. Romantic development is a key part of Tarou's background. He is consistently paired with Tsururin Tsun. Their relationship, alongside other core pairings, was incorporated into the series at editor Kazuhiko Torishima's suggestion, as Akira Toriyama included these elements despite his own disinterest in drawing romance. The later special *Dr. Slump Arale-chan Returns* shows Tarou attending the wedding of Akane and Tsukutsun, set years after the main series. His presence confirms his ongoing role in the community's life events post the original storyline. Across official media like OVAs, films, or spin-offs, Tarou maintains his established role as a wealthy village resident involved in communal activities and part of a steady romantic pairing.