I built this one with a friend, he and I loved similar shows and had various similar ideas but this is my version of them, I've just never really thought about them as much until I started RPing with you,
Lol I have a nice stack of notes here about their culture but also their main combat strength.
Her ability to survive in space is because she can transform her body into a vacuum-capable combat suit using her power. It's a common soldier ability of her race to be able to do so, but she's one of the higher echelons that can go several steps above that, the end result is that she has the power of a small-scale warship because of all the energy she has gathered and refined.
Demaar is more or less a convenient tool for traveling long distances or she would have burned her body out a long time ago xD
Also I realized I still haven't named their race.. Deltanian's perhaps?