>>6219338The main reason I assume space fighter is that she's COVERED in multi-directional thrusters, and the anime preview shows her shields being individually flight capable, sort of like an R-Type or Gradius fighter.
If she was primarily atmospheric, she'd have more of her thrusters pointing in one direction.
Also, if she was a heavy gunship, I'm pretty sure she'd have larger breasts.
Griefen, as an example, is a gunboat, and she's pretty stacked.