Sonia was the lone
daughter to a wealthy general, living her early childhood in luxury while her
country suffered from poverty and warfare. After her father was murdered for
political reasons and her mother went missing, she was dragged into her
country's civil war. She was trained to be an assassin under one of her
father's partners. Many years later, she learns that her boss had killed her
parents and that her jobs were often innocent victims in her boss' way. After
she fails to kill him, Sonia retreats to America as a hitman.
While in Sunshine
City, she joins the "Black Dragon" sect as she learned the true
identity of their leader, Johann.
She gets into a troubled relationship with him and she eventually only stays
with the sect for money. While she was out on a job, she spots Jimmy
and falls in love with him after fighting him. She decides to tag along with
him and settle the score with her boss in the tournament.