Tekken 7: Fated Retribution - Nina Williams

Nina Williams is an Irish, cold-blooded assassin that made her first appearance in the original Tekken game and has appeared in every Tekken game ever since. Nina has a lethal fighting style, consisting of throws, grapples, and holds. She has a rivalry with her younger sister, Anna Williams.   
During the end of Tekken 2, Nina and Anna undergo Cryogenic Sleep. They are experimented upon for 15 years (this is the reason why they both remain physically young throughout the tournaments). Before those years of Cryogenic sleep, she was impregnated without her consent and subsequently gave birth to Steve Fox (who first appears in Tekken 4 and onwards). Nina also stars in her own action/strategy game, Death by Degrees.