Background
Sena was born on Coruscant, to a family of wealthy Corellian entrepreneurs, and did not know hardship in her early life. She lived like the world was her oyster, with everything she wanted given to her. However she was not a brat, she was raised properly, she was compassionate and always took care of those less fortunate than her, when she could. But that life was not her destiny, as she would find out on the day of her parent's anniversary, when she was 10. They went on a cruise over Balmorra, to take in the sights and appreciate the Imperial industry giant. But their fancy cruiser drew too much attention from the Balmorran rebels, who commandeered a pair of AT-ST walkers from one of the factories. Nobody on board of the ship knew what happened when, all of a sudden, the shuttle decided to instantly drop out of the air in a spiraling dive. Everyone on board of the ship were presumed dead and incinerated from the explosion that followed.
By sheer force of will, or luck or just a simple miracle, Sena survived the crash. All she remembered was screaming out in terror, and strange visions, unpleasant and dark, showing up right before the crash. Then nothing, darkness, until she woke up. She was taken in by a family of farmhands nearby the crash sight, who treated her as their own. Until two years after the incident, when a squad of goons in laminate-armor showed up at the farm and gunned them all down. Sena would later find out that they were after her, that the plot against her family didn't stop with the crash, that the AT-ST's used to murder her family had not disappeared "mysteriously",that "they" know about her continued existence, and that "they" took everything from her, including her family name. She had nothing left. Nothing but hatred she left for people who did this to her family. She however would not be lucky enough to find out who "they" were anytime soon...
Motivation