Humans. [He's feeling very Righteous Kami right now. It's a horrible way to go and looks horrible on him. Send help.]

One of them is in captivity and the other is being hunted. On a train. What more could you possibly want?

Well that obviously doesn't matter with half the train's passengers anyway as you so elegantly pointed out. Obviously none of this will make any difference. Things will just go back to the way they were before I arrived and started using magic like I knew what I was doing with it. [This is why martial artists don't do magic, clearly! They're rubbish at it.]