I have shared mine before but I forget where.
"Hitman" was born on the lower levels of Coruscant & orphaned several days later. For my first few years as a youngling I bounced from orphanage to orphanage living in brutal conditions. After escaping at the age of 10 to search for a better life, I had to lie, cheat & steal to get by. At the age of 16 I saw opportunity in the newly formed Stormtrooper corps and discovered discipline in the Empire. They clothed me, fed me, and in return, I got to take out my aggressions on those who would seek to dismantle the new family I found.
My ruthlessness and mercilessness caught the attention of my superior officer, and the report was noticed by someone very high up in Imperial Command.
One day I was pulled off of an assignment and sent on a shuttle to Imperial Center. I was slapped in binders and transported like a criminal. I thought I was being disciplined. But when I made planetfall, I was clandestinely brought to the Imperial Palace.
There, the Emperor himself told me that the person I once was is dead. Erased from all records. I would be one of his Inquisitors now, reporting to no one but him.
He told me of the Force and he sensed my potential with the Dark Side. He gave me one choice: Do his bidding or die.
Eager for power and greater control over my own destiny, I pledged my service to the most powerful man in the galaxy.
For six months, I was personally trained in secret by two of the best ARC troopers who survived the War & the Emperor himself. Then I was deployed to serve with the 501st Legion, watching from within the ranks of Vader's personal soldiers for any sign of flagging loyalty to anyone but the Emperor himself.
Hitman has secret, coded records on every member of the 501st, and (using the tools that the Emperor has provided him with) has manipulated the duty assignment rosters to move around the unit, working with different squads to get a better, closer view of each of the troopers in order to make his own secret assessments...