thing to note: if the mechanism on her arm is meant to retract the sword, why is it on the top of her arm? if the sword comes back to her, wouldn't it be almost impossible to grab? now, if the mechanism was on the bottom of her arm, the sword would retract right back into her hands, making the whole process a lot easier on her!
another thing: why have does she only have leg armor, and mere cloth on the rest of her body? those things are real heavy irl, might want to reconsider their existence.
anyway when designing a character its important to consider the world they live in, their position/social standing within it, and to think very carefully on what they are and do. current design reminds me of some combinaiton of
ky kiske and
meryl stryfe, so i'm guessing they're some sort of soldier for a royal/holy/governmental agency of some sort? if so, maybe try to look up references for 1500-1800s european army wear. but whatever you do, don't limit your inspirations to anime, it really shows.