edit: nevermind everything I said below. I just read a part where she said: “Just like how you killed my gang leader…” Which means she really took part of the banditry, but was just poorly treated.
I just realized something. Doesn’t she kill the shopkeeper out of reflex? Like she said in the beginning, her life was full of kill or be killed - she had no choice in it.
Then again, the way she reacts when killing the shopkeeper suggests otherwise. Cause if it has just reflex, then what good would the swordsman’s death have been?
