See post #2337660.
Upon kai ni/second remodel, Kawakaze wears a more ornate version of her original uniform with red trimming, analogous to the typical Shiratsuyu-class Kai Ni uniform. Added to this is a tattered black and white scarf a la Yuudachi. She gains hair flaps, a gradient to her hair (it now fades to blue), twin braids in place of her twintails and her eyes changes color to golden yellow.
Her rigging is also updated, where her 61 cm quad torpedo tubes on her right/starboard rig is replaced with a second 12.7 cm twin gun mount type C augmenting her existing handgun mount, while she gains reload torpedoes on thigh straps. She also carries three depth charges on her chest belt.