I really wanted to tell this person how good of an artist I think he or she is but I do not really understand this site. SO I am just going to hope they read this :)
at first i thought this was ichirin, i mean the dust sort of looks like a thin cloud/smoke/whathaveyou and then the girl's outfit is sort of reminiscent of ichirin's garb, and then you have the machine that follows her that seems to be most of her offense in the same sort of way that unzan attacks for ichirin
And yes, Libra is extremely dangerous here having great psychic powers thanks to Yuri, being borderline sadistic and psychopatic, unlike this concept art which seems stoic (but her clones are relatively stoic).