Thousands of years ago, Gilmer and his fellow Decepticon Pretenders were passing through the Earth's solar system in an attempt to escape a crew of Autobots led by Metalhawk when both groups wound up crash-landing on the planet. Seeking to conquer Stone Age man, the three Decepticons used their Pretender powers to adopt the forms of monstrous creatures, spreading terror across the world down through the ages as the Autobots struggled to stop them. Over the centuries, the Transformers inspired many Earthly legends with their inhuman forms and deeds; in Gilmer's case, his fondness for dragging ships down into the depths of his underwater domain seems to have inspired many old sailors' tales of beasts from the depths. After epochs of battling, Gilmer and the other Decepticons were defeated by the Autobots and imprisoned, with Gilmer being sealed up in the ancient ruins of lost Atlantis. In the present day, however, the evil alien entity Devil Z has liberated Gilmer and his fellow Pretenders to play a role in his evil plans for humans and Transformers alike.<br /> <br /> There is the sense that Gilmer is a little bit older and wiser than his fellow Pretenders, Blood and Dauros, but that he's been outstripped by these younger, more eager hot-heads, and that he's fairly aware of it. He's quite accepting of this state of affairs, though, and he gets along quite well with both of them in different ways: he and Blood often scheme together, and he regularly goes on missions alongside Dauros, who seems to respect him. However, a fair bit of his time is also spent getting between the two and stopping them from fighting amongst themselves, thanks to Dauros's resentment of Blood's leadership position. Gilmer transforms into a Cybertronic submarine that can hover over ground just as well as it cuts through water. He is a terrifying force in the water, able to create undersea volcanoes, control sea life and use his "Aqua Saw" sword to bend the flow of the oceans to his will. <br /> <br /> (Source: TF Wiki)<br /><br />