She adopts some moves from the Mishima-style karate and is also able to somewhat teleport/hover in the air like her father-in-law Jinpachi. She is assisted by her pet tiger and in some of her moves, like the literal Tiger Uppercut shown in 0:41 of her gameplay trailer below.
Kazumi was the first in the Mishima family to make contract with the Devil Gene, thus explaining why Heihachi, Jinpachi and Lars didn't have it (the devil that possessed Jinpachi was a different entity); during childbirth, she passed the curse to her son Kazuya, from whom Jin Kazama inherited the unstable evil power.
The date for Kazumi's playable debut is yet to be determined; she'll most likely debut this coming June.