Being a Tekken fighter in the game series, Kunimitsu made her first appearance as an unlockable character in the original Tekken. She is the one who used to act as the sub-boss for Michelle Chang. She is also the mother of Kunimitsu II, a ninja who wields a kodachi and tanto.
v3norton.com/tekken-7-season-4-bandai-namco-unmasks-kunimitsu/