King Ghidorah's History
King Ghidorah was an extraterrestrial dragon-like Titan who invaded Earth in the ancient past. King Ghidorah clashed with Godzilla and Mothra, who succeeded in sealing him away beneath the Antarctic ice. The organization Monarch discovered Ghidorah's resting place in the present day, and established Outpost 32 to study him, dubbing him "Monster Zero."
After obtaining the ORCA, Alan Jonah and his men traveled to Monarch's Outpost 32 in Antarctica, where they gunned down all of the Monarch personnel. They entered the base and found King Ghidorah frozen within the ice. Jonah's men drilled into the ice and planted explosive charges within it, while Emma Russell calibrated the ORCA to Ghidorah. Monarch soon arrived and stormed the outpost, engaging in a firefight with Jonah's men. Emma grabbed the detonator for the charges and pressed it, freeing Ghidorah from the ice. After retreating to their stolen Monarch Osprey, Jonah ordered Emma to awaken Ghidorah with the ORCA. She obliged, and the three-headed Titan rose from the ice. Monarch's G-Team opened fire on Ghidorah's heads as they eyed them curiously before retaliating with devastating gravity beams that vaporized them. Ghidorah completely freed himself from the ice and made his way to Monarch's Ospreys, though her daughter Madison used the ORCA to distract him before he attacked them. Godzilla soon erupted from the ice to confront Ghidorah, and the two Titans collided. Ghidorah was more than a match for Godzilla physically, forcing Godzilla to call upon his atomic breath. Ghidorah's heads weaved out of the way of the blast and countered with their gravity beams, which knocked Godzilla off of the ice shelf. Ghidorah resumed terrorizing the humans, destroying one Osprey and killing Dr. Vivienne Graham as she and Mark Russell tried to flee to safety. Before he could kill the others, the USS Argo flew overhead and bombarded Ghidorah with missiles. As Godzilla crawled back onto the ice, Ghidorah took flight and escaped.
Monarch tracked Ghidorah aboard the Osprey, only for him to disappear in a tropical storm over Brazil. Their new priority became dealing with Rodan, a winged Titan which Emma had unleashed from Outpost 56 in Isla de Mara, Mexico. As the Argo engaged in an aerial chase with Rodan, Ghidorah was detected moving to the location within the tropical storm. Monarch decided to lure Rodan to Ghidorah so they would fight each other. As the Argo entered the eye of the storm, it dove out of the way as Ghidorah and Rodan collided and began tearing at each other. Ghidorah restrained Rodan's wings with his left and right heads and fired a gravity beam from his central head that blasted Rodan into the water below. Ghidorah turned his attention to the Argo and pursued it, only to be dragged underwater by Godzilla. Godzilla pulled Ghidorah under the surface and bit down on his left neck, tearing it off. Just as Godzilla seemed about to win, the military's Oxygen Destroyer struck the water and produced a colossal green explosion. While Godzilla was severely injured by the blast, Ghidorah was unharmed and flew out of the water, landing atop the Isla de Mara volcano. Ghidorah regenerated his missing head in a matter of moments and spread his wings, shrieking loudly into the sky. His call awakened other Titans around the world, including Scylla, Methuselah, Behemoth, and the Queen MUTO, all of whom began to rampage. Rodan landed at the foot of the volcano and submitted to Ghidorah, doing his bidding along with the other newly-awakened Titans. Ghidorah made his way to the East Coast of the United States, bringing with him a massive hurricane that settled over Washington, D.C. When Monarch learned that Godzilla was still alive, it sent a nuclear submarine to try and revive him while the Argo battled Ghidorah and Rodan in D.C. along with the military.
Horrified at what her mother had helped to unleash, Madison stole the ORCA and brought it to Fenway Park, where she broadcast a signal that calmed the other Titans and lured Ghidorah to Boston. Upon landing, Ghidorah destroyed the loudspeakers broadcasting the sound and fired his gravity beams into the press box. Madison managed to escape onto the field, but Ghidorah found her and prepared to fire his gravity beams. However, the now-revitalized Godzilla arrived in the city surrounded by a military escort and blasted Ghidorah with his atomic breath. Ghidorah charged at Godzilla and the Titans collided with each other, producing a shockwave that shook the Argo. Monarch deployed two Ospreys to try and save Madison and recover the ORCA as Godzilla and Ghidorah continued to fight. Ghidorah restrained Godzilla with his heads and pinned him to the ground, but Godzilla used his atomic breath to force him off. Mothra flew overhead and used her silk to pin Ghidorah's heads against a building. As Ghidorah tried to free his heads, Godzilla charged and tackled him through the building. As Ghidorah lay on the ground and witnessed Godzilla approaching, he called to Rodan to intercept Mothra. With Rodan and Mothra fighting in the air, Ghidorah and Godzilla continued their battle on the ground. Ghidorah bit down on a nearby power substation and absorbed the electricity, which he projected through the tips of his wings, blinding and stunning Godzilla. Ghidorah pressed his advantage and leaped onto Godzilla, grabbing him in his claws and carrying him into the sky. Ghidorah used his middle neck to strangle Godzilla until he went limp, then dropped Godzilla from above the clouds. Godzilla struck the ground and was left immobilized as Ghidorah landed near him, ready to finish him off. The injured Mothra weakly crawled onto Godzilla and shielded him with her wings, then flew at Ghidorah as he fired his gravity beams, vaporizing her. After Mothra's energy flowed into Godzilla, Ghidorah bit down on his foe and began siphoning his energy through his mouths. Emma, having had a change of heart, repaired the ORCA with Mark and used it to distract Ghidorah and force him to release Godzilla. In order to allow the Osprey to escape, Emma took the ORCA and lured Ghidorah away in a jeep. Ghidorah pursued Emma and destroyed the vehicle with his gravity beams, launching Emma from the car. Mortally wounded on the ground, Emma looked up at Ghidorah and said "Long live the King" as her final words. Ghidorah turned to see Godzilla, covered in glowing orange cracks and emitting intense heat, approaching him. Godzilla emitted a nuclear pulse shaped like Mothra's wings and making the sound of her roar, with Ghidorah trying to shield his heads with his wings. The blast incinerated the flesh on Ghidorah's wings, and he fired his gravity beams at Godzilla, Godzilla was unaffected and unleashed another pulse, disintegrating Ghidorah's left and right heads. Godzilla stomped on Ghidorah's chest as the accumulated nuclear energy inside him exploded, leveling a huge portion of the city. When the smoke cleared, Ghidorah's last remaining head emerged from the rubble, hanging from Godzilla's mouth. Godzilla fired his atomic breath, which incinerated the head and reduced Ghidorah to nothing but ash.
Sometime during the five years following Ghidorah's defeat, Apex Cybernetics purchased the skull of the surviving Ghidorah head from Jonah, and converted it into an organic supercomputer by using the neural pathways scattered throughout it. Apex intended to use Ghidorah's skull as a neural interface for its artificial Titan, Mechagodzilla. Ren Serizawa piloted Mechagodzilla from within the Ghidorah skull during a demonstration of the mecha in which it cleaved a gigantic Skullcrawler in half with its Proton Scream. When Apex finally obtained the energy data from the Hollow Earth needed to fully power Mechagodzilla, it fed the copied energy into the mecha. However, doing so caused Ghidorah's consciousness to override control of Mechagodzilla, after which it killed Apex CEO Walter Simmons and Serizawa. Under Ghidorah's influence, Mechagodzilla freed itself from Victoria Peak and began attacking Hong Kong before engaging Godzilla in battle. Mechagodzilla easily dominated the fight before Kong joined in on Godzilla's side. The two Titans tag-teamed Mechagodzilla, and eventually defeated it when Godzilla used his atomic breath to power up Kong's axe. Kong sliced Mechagodzilla apart before tearing off its head, putting an end to Ghidorah’s vengeance from beyond the grave.
