Varan

Varan is the main antagonist of Varan and a supporting protagonist of Destroy All Monsters.

Varan
After a pair of rare Siberian butterflies were found in Japan, two scientists were sent to investigate the area where they were found, near a secluded mountain village. The scientists were killed by an unknown force, and another team was sent to investigate. There, they encountered the local villagers, who worshiped a mountain god called "Baradagi." The team went out to find a boy who was lost in the forest, but the villagers warned that they would anger Baradagi. One of the scientists persuaded the villagers to go out to find the boy, but Varan, the "Baradagi" the villagers worshiped, emerged from the nearby lake and attacked them. Varan killed the village priest and destroyed the village before returning to the lake he had come from. The J.S.D.F. arrived and surrounded the lake, and opened fire on Varan after luring him out with chemicals. The attack had no effect, and Varan chased two people into a cave. The J.S.D.F. fired flares to distract Varan, prompting him to climb to the top of a cliff. Varan opened large membranes under his arms and dove off the cliff, gliding across the sky and towards the ocean. The J.S.D.F. deployed countless destroyers and bombers to try and stop Varan before he could reach the Japanese mainland, but their attacks did little to slow the beast's advance. Eventually, Varan surfaced from Tokyo Bay and attacked Haneda Airport. The J.S.D.F. attacked Varan with all of their available artillery and jets, but still were unable to harm him. When Varan destroyed a truck containing experimental explosives, it triggered an explosion that seemed to visibly harm him. The J.S.D.F. quickly tied two of these explosives to flares and then dropped them from helicopters, knowing Varan would eat the flares. After Varan swallowed the flares, the first bomb exploded inside Varan, causing him to become weak. Varan limped back into the ocean and disappeared beneath the waves before the second bomb exploded, producing a small mushroom cloud over the water. The J.S.D.F then finally declared the creature dead, although it is unknown if Varan truly died.

Destroy All Monsters
In 1999, Varan was living among Earth's other monsters on the human-monitored Monsterland. When the Kilaaks took control of the island and its inhabitants, Varan disappeared as the alien invaders' global assault was initiated. After the Kilaaks' control was broken, Varan spectated alongside Baragon and Manda during the Earth monsters' fight against King Ghidorah at Mount Fuji. Once King Ghidorah and the Kilaaks were defeated, Varan and all the others monsters returned to Monsterland in peace. Within the context of the film itself Varan is only seen gliding through the air prior to the fight against King Ghidorah, and in the last scene as a static model rather than as a suit.