This is a Tozol scientist named Reilir Vroza. This art was done by the wonderful and talented Test_Pattern. The Tozol species and their setting were also created by him.

The Tozols are a very interesting alien species: they’re genetically-engineered soldiers created by the mysterious Precursors. They are immensely strong, very resilient, and all-around badasses. Reilir is no exception!

Reilir isn't a member of the large Tozol military, however; she is a scientist. Reilir would classify her area of expertise is "Xenology" but that's just a fancy way of saying "studying every sapient alien species out there besides the Tozol." Her studies focus on sapient species (and some non-sapient species) which are of interest to the Tozols. Her work can vary from exploring ruins of a lost civilization, performing stealth surveillance, or even cooperating with scientists from other species.