Gyaos is a recurring kaiju (giant monster) in the Gamera film and anime series, known for being one of Gamera's most iconic and persistent adversaries. Depicted as a massive, bat-like creature with supersonic abilities and a destructive sonic beam, Gyaos often threatens humanity and serves as a formidable opponent in battles against Gamera. In the anime adaptation, Gyaos maintains its role as a major antagonist, posing a significant danger due to its intelligence, adaptability, and predatory nature.