This enemy has high health, high attack power, and a chance to knockback Cats. She has a quick attack animation and attacks rapidly.
Try and use high damaging Cats like Bahamut Cat (Normal/Evolved) and Ururun Wolf, coupled with meatshields like Eraser Cat and Crazed Wall/Manic Eraser Cat. Alone, she is pretty easy, but when there are multiple, a lot of meatshielding is needed. Like above, cats with a knockback ability help because they not only make them stay away from your cat stack, but also help by interrupting their long attack animation.