Radia

Radia is one of the three Impactors to arrive on Earth and a minor antagonist in Chouseishin Gransazer.

History
He and Lucia arrived on Earth with the purpose of exterminating humanity. He soon took an interest in the Gransazers, despite believing them to be too weak to fight him one-on-one. Later, during a battle, he is forced to retreat by Gorbion, causing him to swear a vendetta on the Gransazer

Later, when Lucia is wounded, Radia resolves to complete their mission on his own. He battled Gorbion and Pisces, transforming into a giant after his first defeat. However, Gans arrived and the Water Tribe were able to awaken Leviathan. Despite this, Radia refused to retreat from the fight and ended up being killed by Leviathan.