I love comparing old and new art. It's a real eye opener to how much you improve over time!
As I said, Rini's old design, while I still love it, didn't really fit the character anymore. Rini is a great fighter and a bit of a smartass, so redesigning her started to make sense. Not all that much has changed, but the design is more simple and more practical. Plus I couldn't have Rini's younger sister looking like more of a badass than she did.
Anyways! Hope you like the new design!