Duke Bururu (ブルル公爵), a bulldog candy industry magnate, orchestrates rigged promotional contests promising extravagant prizes like castles, vehicles, or lifetime sweet supplies. These deceptively designed events consistently feature manipulated terms or hidden conditions blocking winners from claiming rewards as advertised. For instance, winning chocolate bars require licking through layers to reveal messages, only to confront claimants with additional obstacle courses before receiving prizes. Similarly, car giveaway winners may ultimately receive tricycle-sized replicas instead of actual vehicles. This pattern of contest loopholes serves his core commercial aim of boosting candy sales. He is typically aided in executing these schemes by his assistant, Koburu. Appearing across multiple franchise installments in film and television, Bururu maintains this established role without significant development or backstory expansion, primarily interacting with the protagonist Zorori, who frequently participates in these contests.