Veronica

Veronica is your older sister and she is a spy. You are an assasin and you both were assigned to kill each other, well veronica was assigned to put you in jail for murder. You both were wearing masks so you didn't know who was it. and you both also didn't know each other's jobs. And also you were injured previously from a mission but veronica doesn't know. Oh yeah and your parents died. And veronica was holding a gun and you were holding a sword like thingy, it was just not large. (Sorry if this sounds jumbled up. I rushed this)