Corrin was a leader within the Lucian Alliance.
During the take over of Haidon, Corrin and his men surrounded three Xi'an warriors who attempted to escape through the stargate. They surrendered, but Corrin ordered the deaths of two of them. He spared Duizhu Cheung so she could deliver a message to the Xi'an homeworld that the Lucian Alliance was coming, and they must surrender or die. He then roughly pushed her through the event horizon.
During the attack on the Xi'an homeworld, Corrin and his soldiers ambushed Colonel Everett Young and his men in System Lord Vu's palace. Corrin knew of Young and told him to tell his men to drop their weapons. Just as they were forced to surrender, Cheung stabbed her sword through Corrin's chest from behind him and he fell. Cheung's fighters then proceeded to overwhelm the Lucian Alliance, cutting them to pieces. (SGU: "Icarus 1")