From Tekken Tag Tournament 2, it's the high-flying luchadora who definitely isn't Julia Chang in a mask, Jaycee. Trained from about 40 screenshots and key art.
helper tags: mask, brown eyes, (dark brown) long low ponytail
i certainly wouldn't deign to put mask in the "outfit" section, because of course your computer will explode if you fail to put it in, or put it in negative
outfit: leotard/wrestling outfit, elbow pads, gloves, black trunks, thigh boots