Nina Williams is a master of the lethal arts and a professional killer known by the alias of "Silent Assassin." She was employed by the Mishima Zaibatsu and acted as commander of the special forces unit, "Tekken Force." However, after failing the mission to retrieve Jin Kazama, she left the unit to work as a freelance assassin. Some time later, Kazuya Mishima takes the lead in G Corporation's attempts at world domination. Kazuya recruits Nina as his direct subordinate and grants her the title of commander of the G Corporation forces.