First things first, I don’t particularly mind the age gap. Dragons are immortal or at least live for a very, very long time so I can understand the age gap. And it wasn’t like he was weird around her when she was a little girl. And 16 is it terrible for Japan… ( ̄∇ ̄")
I do have to say that, choosing to leave her parents behind in a village that literally hates her entire family. Was really fucking stupid. Also, how exactly did the village stop her family from moving away? Her mom‘s complaining about “why do we have to live like this” when she and her husband are the ones choosing not to leave. It’s not like they’re watching her 24/7. They could’ve stolen away in the night.