I LOVE it! The colors really fit - and the two tone colors you added into her costume are great. It sort of looks like you combine her metal/beam powers with the traditional love theme. They braid is a really cool touch that reminds me of her princess form for some reason. Even her bow is cool - more like her school uniform and original design.
Her expression is probably my favorite thing, though. She certainly looks like she's up to no good, but also like she's about read to let some baddie have it. Not too aggressive, but whoever on the receiving end is in for it and they have no idea. I love it. it's *perfectly* Mina.