Thief

"I will do my own mission."
Goju sat down and put his head in his hands. Then he looked up again.
"Well, what will you do for a mission?"
You stood and thought for a while and then you blurted it out.
"I will begin by killing YOU!"
Goju Mina stood wide-eyed at you for the few moments it took him to process your answer and then he ran.