Hotaru-chan appears within the "Film Guru Guru" segment, a series of animated short films created exclusively for the Ghibli Museum and shown there from October 2001 to November 2008. She is part of a recurring ensemble cast alongside Nonaka-kun, Yukari-san, Oku-chan, Toku-san, Hikari-chan, and Toshi-chan. These characters, depicted as staff members in a fictional animation studio, feature designs and personalities inspired by real-life Studio Ghibli employees. Hotaru-chan's specific role, background story, personality traits, and development across the "Ghiblies" media remain undocumented. While listed among the "Film Guru Guru" cast, her narrative significance, character relationships, and evolution throughout the shorts are not elaborated upon. Her involvement in other "Ghiblies" episodes, OVAs, spin-offs, or related official media beyond the museum-exclusive segment is similarly unspecified. Details about her origins, character arc, or actions within the "Ghiblies" universe are not provided.