Background
Yatsu was part of the security force on Yag'Dhul in the Inner Rim. Atleast, until the Empire "liberated" it from the CIS forces. At first it everything continued as normal, the new management wasn't al that bad, but after a few months a lot of non-humans were mistreated by the new occupation. If you're not human you wouldn't get a fair chance. Most aliens in the security force were fired or send out to the more dangeres area's of the planet, Yatsu would've bin one of them if it they had discovered he wasn't a human, but as a Clawdite he had just enough time to get off planet before every alien was forced out.
Motivation