The Gyaos (ギャオス, Gyaosu?)[note 1] are winged monsters and the main antagonists of Daiei's Gamera film series, introduced in their 1967 production Gamera vs. Gyaos and one of Gamera's most famous and recurring opponents. It is the only Gamera foe to appear in productions of all eras from Showa to Reiwa with a number of mutants and evolutional variants and related characters among various subsequent projects, arguably making it the most prominent antagonist of the franchise and the archenemy of Gamera.
Gyaos resembles a giant, vampiric creature resembling bat and bird and pterosaur and western dragons, with a flattened, arrow-shaped head, leathery wings with three claws on each, taloned feet and a flat tail. It is reddish-brown in most incarnations.
In both incarnations the Gyaos have been shown to be astonishingly capable flyers, able to fly incredibly fast and perform agile aerial maneuvers with ease. Although they are nocturnal the Gyaos can overcome the sun - emitting a fog-like gas to obscure the sun and douse flames, while the Heisei version simply hyper-evolved itself to gain protective lenses over its eyes. Interestingly, the Space Gyaos in Gamera vs. Guiron seems to have no such aversion to sunlight: logical, given that it would be impossible for a space creature to avoid sun and star light. The Showa version also has a regenerative ability, as it was able to regrow its severed foot after only an hour. The Heisei version showed several evolutions: it was asexual and could reproduce on its own. While not shown to be regenerative, the Super Gyaos is immensely physically tough, able to easily shrug off missile attacks, and even survive orbital re-entry.
Gyaos also appeared in the short-lived Gamera comic series by Dark Horse. It was the initial foe faced by Gamera, and from whose DNA helped spawn the creature Viras.
The Neo Gyaos Fighting Gamera in "Gamera 2000".
A new species of Gyaos is introduced in the Video Game "Gamera 2000". This Gyaos resembles a two-headed version of Super Gyaos.
Another species of Gyaos called Tera Gyaos was introduced in a game on Toho Kingdom called Gamera vs. Barugon, where Gamera fights the monster.
