Shigezane Date serves as a retainer to his cousin Date Masamune, primarily tasked with managing Masamune's eccentric behavior—notably an obsession with collecting unusual eyepatches. Over time, Shigezane displays resignation toward these antics, seldom intervening to curb them. This dynamic establishes him among the series' beleaguered assistants, sharing duties with Katakura Kagetsuna as they navigate their lord's unconventional conduct.

Shigezane appears alongside Kagetsuna in Episode 10 of the first season, "Ippunkan Gekijō." He also features in Date-centric episodes of the second season, "Gantai no Yabō," specifically those focusing on the Date household.