Jade is my personal favorite by far. Her attitude and personality are just my style, and the fact that she's a Muay Thai practitioner just seals the deal. As a martial artist myself, I appreciate when someone actually knows the names of specific techniques and katas, and doesn't just randomly start spitting out a bunch of random nonsense names because they sound cool. It's also great that you describe the thoughts going through the combatants heads in order to formulate a strategy.
I also appreciate the fact that you show very clearly that just because you're a martial artist, you are NOT invincible, and shit can happen outside of your control. Cecilia clearly didn't just have the natural talent to "adapt" to the MC's fighting style. She put in the work and trained her ass off in order to make MC see her as a legitimate danger/challenge. She might be bat shit crazy, but her dedication to her goal has to be admired.