Mikan recognized the leader of the men as Ganzo, the man who killed her parents and so runs after him.  Rushuna heads out to keep her from exacting revenge on him so that she will not have to live with the killing of the man.  She has to confront the man in the cannon and soon runs out of bullets.  Yajiro shows up with more ammo and Rushuna is able to destroy the armor.  Mikan grabs Rushuna's gun and goes up to kill the leader but Rushuna's words come back to her and she stops short of killing him.