Aldrion was a protoss high templar who was part of the exiles who made it to Shakuras, and was later charged with recovering one of the ancient colossi hidden by his people millennia before. He and three subordinates, Telbrus, Darsiris, and Zoraya, were sent to an asteroid field in a dying star system by Executor Selendis; their goal was to find a vault where a colossus was safely hidden. They used a Dark Templar starship of unfamiliar type, and ran into a number of zerg. After a short battle, they landed on the target asteroid and proceeded to the vault. On the way, Aldrion had to deal with the emotional state of his second-in-command, the fellow templar Telbrus, who blamed the Dark Templar for keeping him from defending his brethren on Aiur.