Originally CT-0312/102, Tym Fett's fighter was caught in a capital ship's explosion and he was assumed dead with his squadron. He crashed landed on a planet and was found by a native female who took care of him, whom he fell in love with.
When he finally was well enough to leave he found that the Republic had turned into the Empire, so he decided to go back to his love and marry her.
He married her, then figuring if he wanted to be certain that no one would recognize him (since he was a clone), he decided to ware Mandalorian armor. So he left to go to Mandalore to find someone who could make this for him.
After getting his armor he went to go home, only to find that his home was destroyed. Someone had seen him and recognized that he was a clone. His wife had been interrogated and killed.
He went back to the ship which had taken him there, the Regal Diathim, and requested if they could take him to their next destination, even though he had no more money. The Captain did one better, she offered him a job as the pilot. Her pilot had betrayed the crew and had been shot before he could send a message to the Imperial forces about the Jedi in their crew.