Ja'far X reader you are the only one

Sorry if it's bad this is my first sooo I hope you like it x3

Your master Kihal has sent you as his best assassin to kill Sinbad as he is keeping your sister as a hostage you have no choice but to obey. As you enter the castle to kill him you were unbelievable close until a white haired man stopped you.......

Characters are not mine please enjoy.^-^