The matriarch of the Mishima clan genuinely doesn’t care what stage you pick against her. Get an infinite stage and she can zone with running 2 without fear of getting cornered. If she gets a walled stage, her incredible wall carry comes into play in her juggles.
And if she lands those juggle starters while she’s in Rage? Then you should get ready for a world of hurt. As BloodHawkTR demonstrates here, Kazumi has wall-to-wall, 70%+ combos off of her ff+4, which is a safe 20 frame mid. The crux of the damage comes from the Rage Drive ender at the wall, which has the unusual property of giving a second wall-splat.