My, my, aren't you the picture of a dashing hero...? I would feel much safer approaching the train with you around.

[She can't help but tease him a little.]

If you're in over your head, leave the rest to me. [She lifts an arm and flexes. There's no muscle, but she's not scrawny either, you know, it's a normal arm.] I live in Tokyo alone, so I learned how to armlock~.