>>28408731She's stacked and thicc*, of extremely vague age thanks to the combination of her physique and the way she dresses, and we know next to nothing about her beyond the fact that she's 'caring' - which in turn isn't completely set in stone due to the whole 'Aether is evil' thing.
Basically she's a blank slate for just about everyone's fetishes (see the fapfic pastebin), and a smoking hot one at that.
*(Though there's even debate about these two)