Something I recently realized after my last post, Dragons main class is probably not Caster, Archer, or Foreigner like I originally believed.
It's Rider.
I got this from Strange Fake's Pale Rider. A Rider that fits the class because it uses living things as hosts to get around. That's how Pale Rider fits the Rider class.
Dragon does the exact same thing with technology. She doesn't just make her machines, she moves in them. Uses them as hosts.
Now, certainly, she also fits Archer, Foreigner and of course Caster. And if she does show up, it probably would be as a Caster.
However, I think Rider Dragon may be far more interesting and something that could be very fun to see in action.
That is, if my assumption is correct and we will be seeing her as a servant.