Helena

Helena is the daughter of Fame Douglas, the murdered chairman of DOATEC and promoter of the first "Dead or Alive World Tournament", and a world class soprano opera singer. Seemingly distant from her father and his work, Helena knew some of his secrets, including the ill-fated 'Epsilon project'. When he was murdered, she was hardly affected. Helena followed in her mother's footsteps, becoming a famous opera singer in her own right. While performing, she was targeted by an unknown assassin using a sniper rifle. Her mother, who was present with her, spotted the rifle at the last second, and dove in front of her daughter. She was killed instantly. The assassin fled, leaving Helena alone and covered in her mother's blood. Helena set out for vengeance. Using her father's contacts and working with his old associate, Gen Fu, she soon discovered that the murder was connected with the second Dead or Alive World Tournament. Helena entered the tournament to discover the truth. During the tournament she hears a rumor that Ayane may be the killer. Helena confronts Ayane with this, and Ayane neither confirms nor denies having killed Helena's mother, after which a fight breaks out between the two.

Credits:
Papacha, and Megaman_Zero from Wikipedia.