Yooooooooo this is so cool ^^ Awesome job!

Cute pic. Sounds like Mizuki isn't a big fan of Treble. :P What is her Rhythm ability?

She does not! I'll share more on that later~

Along with being very agile and athletic; Mizuki's Rhythm ability allows her to cut objects with blades of sound. If you ever seen the movie 'Kung Fu Hustle' and remember 'The Harpist', think that. Mizuki also has sort of a sixth sense tied to her hearing. That combined with her speed makes her difficult to catch/attack. She's 'very' well trained- often considered one of the strongest Rhythm users in the city.

...I'll admit I'm still working on her a bit, tho.

I've not heard of the movie (I don't watch many in general) but I can imagine what that looks like. It sounds like a really awesome ability, especially since I'd guess the sound blades are better at getting through armour than metal blades.