* Expand on her fighting style: Since the movie doesn't disclose her fighting style, you could make her a skilled combatant in a unique form. Perhaps she fights with dual daggers or specializes in a specific martial art.
  Give her a motive:  Is she working for someone? Does she have her own reasons for being involved in the quest?
  Develop a connection to another character: Does she know Mathayus or Drazen from before? Is she loyal to one of them or playing her own game*