Zedus (ジーダス) is a giant sea monster and main antagonist of the 12th Gamera movie, Gamera: The Brave.

Powers
Spear Tongue: Zedus' tongue is extremely long and ends in a hard spear-like tip that he can use to impale enemies.
Extraordinary Jumper: Zedus can jump high and far through the air.

Description
Zedus is a large aquatic saurian monster. He strongly resembles Godzilla and has a large neck frill (that resembles a dilophosaur from Jurassic Park) and vestigial "fins" from his head and his tail. Also he has a rather long and powerful tail. He fights almost exclusively with his claws, teeth and tail. His most powerful weapon is his elongated tongue which he can launch in a "spear"-like attack, reminiscent of fellow Gamera foe Barugon. He is an extraordinary jumper. He feeds on humans almost exclusively in the film.

History
A man-eating monster from the depths of the ocean, Zedus attacked several ships at sea before finally making landfall, causing all sorts of damage. Feeding on cowering people, the beast’s wrath knew no end. Fortunately for what remained of the city, Toto, the young Gamera found and raised by a young boy, appeared. Battling the young turtle, the predator unleashed its spear-like tongue on the reptile. After several missed, Toto grabbed the tongue and held on as it pulled back into his maw. The creature was blasted in face with a ball of fire, sending the monster into the sea below.

Zedus’ returned in full force, attacking the complex that Toto was being held in before unleashing his wrath on the rest of Nagoya. The two clashed once again, and like before, Zedus was quickly getting the upper hand. Overpowering the turtle with brutality, the creature tossed Toto into a building. The hero’s body now stuck in the building, Zedus began to climb up.

The predatory kaiju had no idea that Toto had just been empowered by the jewel that gave him birth and was knocked off of the building by the flying Toto. Quickly getting to his feet, he lashed out with his tongue yet again, this time impaling it through Toto’s shoulder. As the two struggled on, Toto ripped the tongue in half and unleashed a powerful fire ball. The ball of flames quickly engulfed the creature and blew it to bloody pieces.

Zigra is an alien monster and the main antagonist in Gamera vs Zigra, the seventh Gamera film. Zigra is a deadly opponent whose appearance is similar to that of a Goblin Shark, possessing a silvery gray, armor-plated hide, a pointed nose, a row of sharp fins on his back, as well as sharp pectoral fins.

History
Zigra invaded earth with the intention of enslaving the human race and raising them like cattle - he came from a planet where instead of people eating fish, fish eat people (thus making the film the first known Japanese instance of the Russian reversal). Like Viras attempted three films earlier, Zigra held a pair of human children hostage in order to force the human race to conform to his plan, but Gamera engaged him in battle. Gamera eventually threw him on land, using a rock to play his theme song on Zigra's dorsal fins like a xylophone before burning the huge Alien shark alive, incincerating and killing Zigra.

In the film Gamera: Super Monster, Zigra fought with Gamera again in one of the many stock footage scenes. When Gamera hits his back with the rock, his theme song is not played, and is instead replaced by a new, simple new tune.

Abilites
Zigra's attacks are all based around his blades on his back, head and, fins. His great speed and agility allows him to easily doge Gameras attacks and out monover him. But Zigra's weakness is that he is helpless outside of water. Zigra can also shoot a beam of light from the gem between his nose that paralayses an opponent.

Other Appearances
Like many of his fellow Showa monsters, Zigra has not made a film appearance outside his initial debut, (except for the obvious stock footage scenes). However, he made an appearance in the Gamera comic series by Dark Horse Comics, that was based on the Heisei Gamera series. In the story, Zigra was an escaped alien creature from outer space, who managed to find his way onto Earth. He'd eventually meet up and face Gamera, who made relatively short work of him. In this series, he was pretty much unchanged, except for the fact he was more of a wild animal, and was more aquatic-based.

Bio
Viras is an alien Kaiju featured as the main antagonist in Gamera's fourth film, 1968's Gamera vs. Viras, known as "Destroy all Planets". Viras was the leader of an alien invasion, set upon conquering the Earth. An earlier attempt by his kind was easily thwarted by Gamera, so Viras employed a mind probe to discover Gamera's weaknesses. Viras discovered Gamera's kindness to children, and exploited it by kidnapping two Boy Scouts and using them as hostages, coercing Gamera to get into perfect position for the launching of the mind-control device. Gamera was then made to rampage through Japan, the targets being the Okomasashi Dam and eventually Tokyo. When the two boys were able to escape, Gamera attacked, and Viras fused with his crew members to become a giant. After a fierce battle, Viras was presumed dead when Gamera flew with him up into space, freezing him to death in the icecold, and then dropping him to his fate.

Abilites
Viras' main attack is his constricting tentacles on both his body and head. He posesses a sharp beak and can make the tentacles on his head form into a spear-like point. He has no projectile weapons to speak of. He also has the ability to breath underwater and the ability to talk through telepathy.

Weakness
Viras is susceptible to being frozen. Gamera kills him by flying him up in to the atmosphere and freezing him solid.

Other Appearances
Like many of his fellow "Showa" era monsters, Viras has not appeared in any movies since his initial movie debut, save for a stock footage appearance in the film Gamera: Super Monster. However, he made an appearance in the short-lived Gamera comic series by Dark Horse that was based on the Heisei Gamera movies. In this series, he was the product of experimentation with Gyaos DNA. He'd eventually face off against Gamera amidst the streets of Paris, France. In said comic series he looked relatively the same, except for more Octopus/Squid-like features. Viras also appeared (along with other "Showa" era Gamera monsters) in an episode of the children's cartoon Franklin. In the episode, Franklin is afraid to go into his shell at night because it's dark, and his fear is manifested as ghosts of the various Gamera monsters including Viras that come out of his shell.

Legion is a colony of an extraterrestrial species of Silicon-based organisms from the movie Gamera 2: Advent of Legion. These creatures appearing as the main antagonist of the film and the second antagonist species to appear in The Gamera Trilogy.

Appearance
The Symbiotic Legion, as noted in the movie, are a Silicon-based extraterrestrial lifeform. Legion's exterior greatly resembles that of an insect, especially that of a Rhinoceros Beetle. The Legion do not actually have muscles. Instead, they are able to move through pressurized gas that passes through their seemingly hollow exoskeleton. Their reproduction is unknown except for the fact that they spread through an enourmous pod that they fuel with oxygen to ignite a massive explosion to launch their species throughout the galaxy. The Queen leads this operation. On her abdominal region, she sports multiple egg-cases which house Symbiotic Legion Soldiers which she can dispatch at will to do her bidding. If these workers are not enough to protect their pod, she will emerge to guard its location.

Profile
Queen Legion
Height: 140 Meters
Total Length: 160 Meters
Weight: 600 Tons
Flight Speed: Mach 1
Tunneling Speed: 50 Kilometers per hour
Homeworld: Unknown
Favorite Food: Silicon
Body: Its body structure is similar to crustaceans. Its body tissue is based on silicon and has a semiconductor like structure. She is durable, able to withstand a frontal assualt from the Japanese SDF and resist Gamera's Mana Blast for several seconds. The Queen Legion does in fact have usable insect-like wings that give her the ability to fly, despite her enormous size.
Main Organs:
Eyes: Can recognize electromagnetic waves of all wavelengths. Eyes are usually blue but turn red when angered.
Mouth: Legion can fire a bluish beam of focused microwaves that is fired from the Queen's upper lip (nasal horn). It can also fire Butte Legion when the part in the center. when it is opened that possesses major destructive powers, able to destroy and entire manufacturing facility in a few blasts and even put holes in Gamera's plated shell. It is sharp enough to leave cuts in Gamera's body. It should be noted that Gamera's hands were burned when it ripped of the top part, implying it is very hot.

Egg Chamber (Ovary): Legion can produce up to 100 Symbiotic Legion Soldiers an hour from the red egg chamber on her abdomen. These soldiers follow her every command and attack with tooth and claw to the end to protect their colony.
Tunneling Arms: Serves the role of excavators allowing Legion to move about freely underground.
Rear Legs: Two legs with sickles attached to them. Tt is possible to attack the enemy from underground with them and they have a wide range of motion. Are powerful enough to knock Gamera out of the sky and pierce his shell.
Shell: Legion is covered in an insulating material similar to regid silicon resin. Highly durable.
Interference Claws: The extra clawed limbs that form a "crown" around Queen Legion's head can produce a variety of electromagnetic waves to deflect missiles and neutralize Gamera's fireballs. In a damage state they can not completely counter stonge projectiles like Gamera's fireballs.
Main Technique:
Microwave Shell: Using the Nasal Horn and the interference claws Legion can create an electromagnetic field to counter Gamera's plasma fireballs and missiles.
Butte Legion: If her nasal horn is torn or blasted off, Queen Legion can produce crimson tendrils the spot in between her nasal horn. They can move about freely and are have high temperature allowing them to cut through Gamera easily.

Trivia
The Legion gets their name from a comment a soldier made in the film; quoting the Bible, "And Jesus asked him, "What is thy name?" He replied, "My name is Legion, for we are many." Mark 5:9
The Queen Legion is the second female monster to appear in the Gamera series, the first being Jiger.
The Queen Legion is by far the largest monster Gamera has ever fought.

Irys (sometimes spelt Iris in the East) is the main antagonist Kaiju from the third & final film in the Heisei Gamera trilogy, Gamera 3: Revenge of Irys. Irys is Gamera's last and most powerful opponent he has ever faced.

Form and abilities
The baby Iris has an armored, mouth-less head with small black eyes, and several long tentacles which sprout from a snail-like shell. It can absorb the life force of organic matter by stabbing them with its tentacle spears, leaving decayed corpses in its wake. The Behind The Scenes feature on ADV Film's DVD shows it was realised on-screen by a remotely-operated puppet.
The adult Iris is basically a bipedal creature with two hooved legs and retractable sword-like arms, topped by a head that resembles a pointed seashell. Its back is a mass of saw-edged plates, and from its sides spring four tentacles hundreds of meters long. Each of these is tipped with a bony spearhead, from which Iris can fire a sonic beam similar to the Gyaos. Iris can still drain the life force from its victims, and in the case of Gamera it was able to absorb the monster's abilities and produce its own fireballs. Its chest region is also covered in glossy, bioluminescent patches. The center patch can suck things into its body. While Legion is the biggest monster Gamera has ever fought Irys is the most powerful.

History
Iris begins its life as a stone egg, sealed within a small underground temple in Nara village and guarded over by a family line named Moribe - local legend said it was the resting place of a demon called Ryu-Sei-Cho. (A character explains this name to be linked to Chinese mythology) A stone of unknown origin is said to keep the demon dormant as long as it's not moved.
A young girl named Ayana Hirasaka - left an orphan by the 1995 Gamera/Gyaos battle and blaming Gamera for her parent's deaths - entered the cave on a dare and moved the stone. In the process she and the latest son of the Mirobe line discover both the egg & an amulet, similar to the one that linked Asagi to Gamera in the first film. The egg later hatched, produced an infant Iris.
Ayana gains a link to the creature via the amulet and feels a kinship with the creature, stating at one point "Gamera killed its family too"; driven by total hatred for Gamera, she raises Iris (naming it after her dead pet cat) in hopes that it will become strong enough to kill him for her. It was shown to have an affectionate nature, but this is shown alongside the sinister way it eats and, later in the film, the woodland animals it leaves dead.

It is not long before Iris it attempts to merge with Ayana - and her actions show she's willingly letting it do so - by sealing her in a cocoon. Moribe discovers her and cuts her free. She is then taken to a hospital. While Ayana is gone, Iris grows kaiju-sized in the woods as it devours several villagers, including Ayana's adoptive parents and brother. Shortly, the monster grows into its adult form.

The Japanese Self Defense Forces quickly deploys and surrounds Iris as it sleeps, attempting to take it out with machine guns and bazookas. Some of the soldiers are killed before Iris takes to the sky and heads for Kyoto, where Ayana had been transferred earlier. The JSDF sends two F-15s in an attempt to shoot Iris down, but it is able to evade them and almost kills them. The fighter pilots are saved by the sudden arrival of Gamera, who engages Iris in a mid-air battle. The JSDF ends the battle by shooting at Gamera, which slows him down and allows Iris to continue on to Kyoto.

Soon, Iris lands in Kyoto and fights Gamera on land with Ayana watching and commanding to kill it. Iris manages to knock Gamera down for the count and then attempts again to merge with Ayana; when Moribe intervenes, the creature swats him aside and sucks her into its body against her will. While inside, Ayana realizes that she fueled Iris' destruction with her emotions - it was her hatred that led to the death of her adopted parents, and Super Gyaos instead of Gamera actually killed her parents. All seems lost until Gamera suddenly punches through Iris' armor and rips Ayana out.

Infuriated, Iris pins Gamera's hand to a wall with its spear hand and begins to absorb Gamera's energy. Its tentacles begin to form plasma balls, when Gamera quickly uses a plasma ball himself to sever his own hand. Iris fires the absorbed plasma balls at Gamera who uses his stump to turn the plasma into a plasma fist. Gamera then uses the fist to slice through Iris' chest, killing it and ending its reign of terror.

Unconfirmed origins and motives
The origins of Iris are not explained, and instead the film presents Chinese mythology as explained by Ayana's adoptive brother, the beliefs of the Moribe clan matriach, the theories of government agent/misanthropic recluse Kurata Shinji and the actions of government agent & cultist Ms Asukara.
Grandmother Moribe states that the Ryu-Sei-Cho is a demonic creature that will destroy the world if it is ever released. In contrast, the mythology that the Ryu-Sei-Cho name comes from suggests that the being is the mythical "Guardian of the South", who will defend against a threat from the South; a tortoise (hinted to be Gamera) is said to be Guardian of the North and Ayana asks if the two Guardians are rivals (this was unconfirmed).

Kurata's belief is that Iris was designed by "the ancients" (Atlanteans), as Gamera and Gyaos was, but with the specific intention to stop Gamera from saving humanity from the Gyaos - "there could be a worse future for Earth than our extinction" and Iris was created to stop that future. He theories it will permanently merge with Ayana to gain power, similar to how Gamera bonded with Asagi but to a greater degree so it can overpower the guardian. Here, Iris is basically out to ensure extinction of mankind (something he openly likes the sound of).

Kurata's belief fits in with what is shown of Iris and its actions: it is specifically awoken by the Gamera-hating Ayana, who lifts a stone it is stated a sumo wrestler couldn't move; like Gamera, it has an Atlantean amulet that links it to a human (effectively making it the anti-Gamera); through Asukara, said to be an Atlantean descendant, it is shown there is a long-running religious belief that Iris will protect Earth from destruction by Gamera; and after it is destroyed and Gamera is wounded, Gyaos flock towards Japan as if they know it's left them an opening.

It is also shown that Ayana's hatred and malice drives Iris, and it was her influence that caused it to massacre her village & adoptive family and seemingly her influence that causes it to attack Gamera. This could mean Iris' development was warped by contact with Ayana and it would not have been hostile otherwise, or simply that the creature was designed to be awoken by and to seek out individuals with such hostility in them.

Guiron is a Kaiju that appeared as the main antagonist in the fifth original Gamera movie, Gamera vs. Guiron, (Known statewise as "Attack of the Monsters"). Due to the lack of distinction in Japanese between the "l" and "r" sounds, Guiron is actually named after the guillotine.

Appearance
Guiron is an alien monster that normaly walks on all fours, but can also stand on two legs when the situation requires. It is an unusual looking creature, with tough gray skin, a small mouth, sleepy looking eyes and a low, groaning bellow. The most unusual feature of this beast's anatomy, however, is the gigantic blade that it sports on its head, which is nearly as long as its body.

Abilities
Guiron is mostly a melee oriented kaiju. Almost all of his abilities revolve around the massive blade he sports on his forehead. It is strong enough to reflect a blast from a Space Gaos and cut Gameras shell. When he can't use his blade Guiron resorts to his secondary attack. A pair of four shurikens stored in two circular indents in the blade. Guiron can guide these shuriken using telepathic waves. They were sharp enough to cut right through Gameras arms.

History
Guiron acted as the guard dog of two brain-eating space women, the last of a dead civilization on the planet Terra. The aliens guided him with a mind control device. Guiron proved his combat prowess by effortlessly defeating a Gyaos, reflecting its sonic cutter beam and literally slicing it to pieces with his blade. Guiron later fought Gamera, and nearly killed him as well. After a long fight, Gamera eventually managed to defeat the knife headed beast by flipping him upside down - his blade stuck in the earth - then igniting a missile that had gotten stuck in his circular indents, blowing his head off and killing him.

Gamera vs. Guiron
Gamera vs. Guiron (ガメラ対大悪獣ギロン Gamera Tai Daiakujū Giron, Gamera vs. Devil Monster Guiron, released in the U.S. as Attack of the Monsters), is a 1969 kaiju ("monster") genre film, the fifth entry in the original Gamera series.

Plot
While scanning the skies through their telescope, two young boys, Akio and Tom, spy a spaceship descending into a nearby field. Stunned, bewildered, and bemused, they tell Akio's mother what they have seen, but she dismisses their story as childish nonsense. The next day, the two boys—with Akio's younger sister, Tomoko, in tow—bicycle to the site to investigate. Enthralled, Akio and Tom manage to steal into the spaceship. But then, without warning, the ship takes off, leaving Tomoko behind. It soars into outer space...toward a field of asteroids, which sends the boys into panic. However, Gamera (obviously aware of the boys' plight) appears and clears a path for the ship through the asteroids. The spaceship, flying near the speed of light, leaves Gamera behind and transports the boys to an unknown planet, where it lands on the outskirts of an alien city. Suddenly, a silver "Space" Gyaos appears, menacing the ship and the two young boys. Just before the creature attacks, a second, bizarre monster—whose head resembles a knife—emerges from an underground lair and attacks the Space Gyaos. After a violent battle, the knife-headed monster kills the Gyaos by chopping it into pieces.

Akio and Tom explore a portion of the alien city and meet the planet's only inhabitants: two beautiful women, named Barbella and Florbella, who explain that their planet, known as "Terra," orbits the sun directly opposite the earth, which is why it has never been discovered by earth's astronomers. Furthermore, Terra is facing extinction; not only is the planet growing old—and cold—the Space Gyaos race has targeted it for occupation. The knife-headed monster, which the Terrans call "Guiron," is their last defense against the Space Gyaos.
Barbella and Florbella suddenly turn on Tom and Akio and put them into restraints. Using their super-technological devices, the alien women probe the boys' minds, in the process learning about Gamera—who, they discover (again via stock footage), has a terminal soft spot for human children and is hurtling toward Terra on a rescue mission. The Terran women turn out to be cannibals and plan to feed on the boys' brains. In preparation to extract his brain for their nourishment, the women shave Akio's head. Now, however, Gamera lands on Terra in search of the boys. The women deploy Guiron to attack the giant turtle, and after a brief battle, Guiron renders Gamera helpless, sending it into a lake...unconscious and on its back.

Tom manages to free Akio, but, in the process, unintentionally releases Guiron. Out from under the aliens' control, Guiron rampages through the Terran city—even attacking its masters as they attempt to flee to Earth. The knife-headed creature slices the spacecraft in half, mortally injuring Barbella...who then dies at the hands of her own companion. Guiron attacks the base where the boys are imprisoned, but Gamera awakes and renews its assault on the alien creature. Gamera finally rams Guiron's head into the ground, and, using a missile launcher they have retrieved, the boys fire a missile at Guiron, slicing it in half and killing Florbella. Gamera uses its flame energy to weld the alien spacecraft back together, so that Akio and Tom can use it to return to earth.

Barugon (バルゴン) is a monster featured in the second Gamera film, 1966's Gamera vs. Barugon, (better known as "War of the Monsters" stateside.) Barugon is not to be confused with the similarly named Toho Kaiju Baragon. The similarity in name is probably a coincidence, as katakana only offers a limited number of three syllable combinations. They are both similar to ground-like dinosaurs.

Showa Version
Barugon is a gigantic quadrupedal reptile, with sharp teeth, a long horn on his snout, smaller horns above his eyes, and a long whip-like tail. He has two rows of short spikes running down his back, which begin to glow when the creature is ready to attack. Barugon also possess a very long, stiff tongue with a clubbed tip, and has blue blood.

History
In ancient times the Barugon egg was placed in a cave on his native island. Hundreds of years later an expedition to the Island to get the egg (thought to be a giant opal) was undertaken. The egg was then taken back to Japan to be sold. As the ship docked in Osaka one of the sailors left it under an infrared lamp meant to cure his jungle foot fungus to go play poker. While gone the lamp incubated the egg and it hatched into a baby Barugon. It then grew to full size causing the boat to explode. Barugon then headed into downtown Osaka. Rampaging the military atempted to destroy it with a missle strike but barugon destroyed it with his rainbow ray. The Radiation of the ray atracted Gamera. The two titans clashed and just when Gamera got the upper hand Barugon froze him solid. The military and Gamera out of the way Barugon left Osaka and headed for Tokyo. The miliary tried to lure Barugon to a deep lake knowing he would drown in fresh water with a large dimond on two occasions the second attempt applying infrared light. Both failed. Just as all hope seemed lost Gamera burst from his icy prison and began to fight barugon in round 2. Gamera succesfully killed Barugon by dragging him into the deep lake and drowning the giant once and for all.

Powers and Weaknesses
Barugon has three major powers. One of them is his extendable tongue. His tongue has a the ability to fire out like a giant battering ram. Zedus also has a similar tongue, but it has a spear-like point. His second power is an icy spray that he can fire from the end of his tounge. It was strong enough to freeze Gamera solid for eight hours. Barugon's final power is the ability to use the spikes on his back to project a rainbow out of his back that can destroy a whole line of missles, as seen in War of the Monsters.
Barugon has a deadly weakness to fresh water. In the movie, they kept him under restraint with artificial rain. In the final fight with Gamera, Barugon is drowned by Gamera in a deep lake. Barugon is also attracted to shiny objects. he was almost lured into a lake with a diamond on a boat with an infrared light shining through it, but he used his tongue to grab the diamond and walk away unharmed.

Trivia
Barugon's name is sometimes stated by some Toho fans as an edited copy of of one Toho's kaiju, Baragon, but looks like Anguirus.
Barugon was considered by the film makers of Gamera: Guardian of the Universe to be Gamera's opponent before Gyaos was ultimately chosen.
Barugon is Gamera's very first enemy.
Barugon is also the first ancient monster in the Gamera series.

Gyaos (ギャオス Gyaosu), is the name of several daikaiju from Daiei's Gamera film series, introduced in their 1967 production Gamera vs. Gyaos and one of Gamera's most famous opponents. It is the only Gamera foe to appear in the Showa, Heisei, and Millennium Gamera films. This makes Gyaos, arguably Gamera's arch nemesis, though Iyris and Queen Legion may also be likely candidates.
Gyaos resembles a giant cross between a pterosaur and a bat, with a flattened, arrow-shaped head, leathery wings with three claws on each, taloned feet, and a fish-like tail. It has dull blue skin in most incarnations. The Gyaos in Gamera: Guardian of the Universe had a more streamlined appearance, with larger wings and a longer neck, as well as red eyes.

Appearances
Showa Era
In Gamera vs. Gyaos, Gyaos appeared in Japan from a large cavern, and feasted on blood (principally that of livestock and human beings). Soon, Gamera confronted Gyaos, and after a battle, Gyaos was forced to flee and Gamera was forced into the ocean to recover. It is soon learned that light from the sun causes Gyaos' tissue to shrivel, so the light of the city stadium of Nagoya kept Gyaos at bay. Gamera soon returned to finish Gyaos off and, after a battle in the air, Gyaos cut off his own foot to escape from the sun. The protagonists developed a plan to place artificial blood on a rooftop in Nagoya. The plan was to keep Gyaos drinking the blood for so long that the sun would come up and kill him. But Gyaos proved more cunning than originally thought and used a strange fog attack to protect himself from the sun. The next plan was to lure Gamera to Gyaos' lair in the forest by setting the forest on fire. Gyaos used his fog attack to put out the flames, but Gamera arrived and eventually defeated Gyaos by throwing the beast into a volcano.
Space Gyaos appeared briefly in Gamera vs. Guiron, and quickly finds itself victim of Gamera's titular opponent. In reality, Space Gyaos is simply the Gyaos prop from Gamera vs. Gyaos painted silver. This was done because production crew of the film did not have the time and budget to invest the time of creating another new monster.
Stock footage of Gyaos was later featured in the Shōwa series recap Gamera: Super Monster among others.

Heisei Era
In 1995, Gyaos was revived with Gamera for the first Heisei era Gamera film, Gamera: Guardian of the Universe, which follows a story similar to the one above. In this, the Gyaos were reimagined as creations of the ancient Atlantis civilization designed to control pollution. However, the asexual Gyaos reproduced out of control and destroyed their creators. As a last-ditch defense, they created the Gameras, who eliminated the Gyaos, although not in time to save the Atlanteans. However, clutches of Gyaos eggs survived and one clutch hatched in the modern world. After killing and eating all the inhabitants of Himigami Island and attacking the mainland, the Gyaos were lured to the Fukuoka Dome stadium in Fukuoka. The last Gamera, sensing his ancient foe, awoke as well and made his way to Fukuoka. Gamera attempted to stop the Gyaos, killing two, but was hindered by the misguided military, who considered him to be the greater threat. Eventually Gamera killed the last Gyaos, which had nested in Tokyo and had grown into Super Gyaos. Super Gyaos would also appear in flashback scenes in G3, and would eventually be revealed as the real killer of Ayana's parents.
The Gyaos do not appear in G2, but they are mentioned and are the subject of a book.
The Gyaos returned in a new, evolved form known as the Hyper Gyaos in G3, after Gamera used his mana cannon to destroy Legion in G2, which drained the Earth's mana, creating the right conditions for more Gyaos to hatch. Early in the film, Gamera battles a pair of Hyper Gyaos in the Shibuya district of Tokyo, killing them but also killing and injuring as many as fifteen to twenty thousand civilians. After Gamera defeated Iris in Kyoto, thousands of Hyper Gyaos swarmed towards Japan, intent on killing Gamera once and for all.

Millennium Era
The Gyaos make a cameo appearance in the newest Gamera film Gamera the Brave, as Gamera dies while fighting several Gyaos in a small village. This makes them the only monster in the Gamera series apart from Gamera himself to have appeared in the Showa, Heisei and Millennium series in some shape or form.

Powers and Abilities
In all incarnations the Gyaos have been shown to be astonishingly capable flyers, able to fly incredibly fast and perform agile aerial maneuvers with ease. Also, Gyaos have the ability to fire sonic beams from their mouths that can cut through nearly anything short of Gamera's shell, however, the Showa Gyaos had a weakness in that the double throats it used to create its Sonic Ray limited the mobility of its head and neck. 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 evolves into Super Gyaos and grows protective plates over its eyes. While sunlight was merely an annoyance to the Heisei Gyaos, it was a fatal weakness in the Showa Gyaos, as Ultraviolet rays ate away his tissue. Interestingly, the Space Gyaos in Gamera vs. Guiron seems to have no such aversion to sunlight. 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 however this isn't surprising as many kaiju have done things similar to these feats. In all eras Gamera and Gyaos are considered archenemies.

Film Appearances
Gamera vs. Gyaos
Gamera vs. Guiron
Gamera: Super Monster (Stock Footage)
Gamera: Guardian of the Universe
Gamera 3: Revenge of Iris
Gamera the Brave

The Heisei Gyaos also appeared in the short-lived Gamera comic series by Dark Horse Comics. It was the initial foe faced by Gamera, and from whose DNA helped create the Kaiju Viras.