Unfortunately I can tell you little more than we already know judging by the picture - and I agree with you that it appears to be female.

It's definitely in the family Tettigoniidae (with other katydids and crickets) but I cannot key it further with my limited knowledge of the local species in your area and without a better quality pictures of the insect... but I don't think identifying it to species is all that important right now anyway. Keep it as we've discussed and if you are fortunate it may thrive and breed for you. I only have exerience culturing one species of katydid, and while the methods to raise them are probably similar, you are likely the first on this forum to take a stab at raising this specific insect.