Ohhh, I get it - it's not you slaying the dragon, it's the dragon who's doing the slaying!

[Hence 'dragon slayer', like he's a 'human swordsman'! Right? He nailed it... maybe! But that still leaves a very big elephant in the room. No matter how he looks at it, Wendy is clearly human... or is she? Maybe this is a shape-shifting situation? Or maybe she was adopted? How does he ask politely?]

...

Aren't you a human, though?

[Yeah, he just gave up and asked bluntly.]