Gyopi is a pink goldfish and a central figure in the story as the sole remaining treasure of the formerly wealthy Chitose Fujinomiya. The goldfish was a precious gift from Chitose’s beloved father, making it her most cherished possession after she loses her fortune and status. Despite being a small fish, Gyopi holds an immense monetary value, reportedly worth several hundred million yen. This immense worth is a driving force for the series’ conflict, as various characters, most notably the family’s former attorney, repeatedly attempt to steal the goldfish for its financial gain.

Gyopi is not a typical goldfish, as it possesses the extraordinary ability to speak and can even fly through the sky. These unusual abilities make Gyopi an active participant in the story rather than a passive pet. The goldfish acts as a constant companion to Chitose, accompanying her from her elite private school to the rural public school where she eventually becomes student council president. Gyopi’s interactions with the other characters help to soften Chitose’s uptight and arrogant personality, showing a more vulnerable and sentimental side to her.

The relationship between Gyopi and Chitose is the core of the character’s role, serving as the living link to her past and her father. While Chitose officially owns Gyopi, the goldfish also forms a close bond with her new schoolmates, particularly the energetic Wapiko, who is often seen with the fish. Being constantly targeted for theft puts Gyopi in the position of a Distressed Dude, often needing to be protected or rescued by Chitose and her friends from various schemes. The goldfish’s safety is a primary motivation for many of the protagonists’ actions. Gyopi is a non-human sidekick who, through its mere existence and unique abilities, adds a layer of magical realism to the predominantly comedic and chaotic world of the rural school.