Nina Williams is the Irish assassin who is the only female playable character to appear in every main Tekken game.
Nina debuted in the original Tekken in 1994 as a professional assassin from Ireland. Her fast, technical fighting style is built around assassination arts, grappling, counters, and chain throws. She has remained a consistent playable presence through the main series, including Tekken 8.
Her sister Anna Williams is the most common source of confusion. Anna is also an Irish assassin and a major recurring character, but she was absent from Tekken 4 and has not appeared as a playable character in every main entry. Julia Chang and Jun Kazama likewise have missed individual main installments.
Nina’s story is unusually tangled with the series’ broader plot. She was placed in cryogenic sleep after the events of Tekken 2, awakened with amnesia in Tekken 3, and later became involved with the Mishima Zaibatsu. In Tekken 4, she is hired to kill boxer Steve Fox before discovering that he is her biological son. Nina also stars in the 2005 spin-off Death by Degrees.