While there has been a good deal of Voice Actresses voicing Nina Williams, the most noteworthy of all Nina voice actresses has to be Lisle Wilkerson, who has been voicing Nina in Tekken 4 and Tekken 5. Nina was also voiced by Yumi Touma in the earlier Tekken games.Due to several traumatic events in her life, Nina seems to be cold and indifferent. In fact, she had been drugged by an underground force when she was young in order to create the perfect assassin. Her bitterness towards men could be a result of her defilation after Tekken 2. Often, she seems unaware of her sex appeal. The only man she had ever trusted was her father, who had died shortly before Tekken 2. Ironically, after her father's death, Nina was controlled by Ogre. Thus, she was unable to feel any emotion. Nina's feelings of resentment burrowed deeper when she found out, during Tekken 4 through the syndicate, that she was impregnated.

Nina's personality remains monotonous yet sadistic when it comes to teasing Anna. Nina's winposes range from boyish to flirtatious, usually by placing a foot on top of the opponents body, or showing off her shape.

Nina is notable for her long blond hair and crystal-blue eyes. Her look contrasts from that of her sister, Anna, who is a brunette.

Nina's signature color is purple, as she has at least one purple outfit per game. Her trademark costume is the "catsuit", as she has worn many different designs of catsuit in both Tekken and Death By Degrees, which are made of materials resembling spandex, PVC and leather.

Nina wears her hair tied into a ponytail or a braid. Her skin is ivory-colored and she has an hourglass shape. Nina almost always wears lipstick, from violet (Dbd) to red (Tekken 1, Tekken 2) to bronze (Tekken 3) to peach (TTT, Tekken 4, Tekken 5,).