S4-D15T is the result of putting a tactical assassin droid's brain in the chassis of an upgraded B1 battle droid. The resulting configuration made regular memory wipes difficult at best. Original built to infiltrate CIS outposts, S4 was deactivated after the Clone War, but not before developing a personality from the infrequent and incomplete memory wipes.

Scheduled to be scrapped around the inception of the Galactic Empire, the deactivated S4-D1ST was saved by a "collector". The collection was eventually robbed, and S4 was activated by the thieves, thinking they could just order the droid to help them carry the plunder out. This was a tragic mistake on their part, as they were dismembered by S4 using a retractable vibrosword.

Reactivated, low on power, and without superiors, S4 wandered off to find a new path and a new purpose.

Quiet Professionalism: There is an old saying in the bounty hunting trade that good work makes little noise, and the character is the embodiment of that. Like a master artisan, the character pursues bounties with far greater care and attention to detail than most. The PC sees little need for flashy accouterments or ostentatious shows of prowess.

: (??? obligation) Keeper of the Faith: Much to many other freelancers' amusement, this character has sworn to faithfully uphold both the spirit and the letter of some code of honor. The PC believes very strongly in these edicts and adheres to them with an almost religious fervor, The Character never knowingly breaks any of the rules laid down in the code, and may turn on colleagues who do so.

: (10 obligation) Debt: The character owes someone a great deal, whether that debt consists of money or something else. Perhaps the PC has a huge gambling debt to a Hutt, is indebted to the Czerka Corporation for his starship, owes a wealthy family for patronage, or has some other serious financial obligation. To make matters worse, depending on who owns the debt, even fully paying it off might not get the character completely off the hook—if the character can get that money, he can surely get more.