For projectiles, she can dash under them or blow through them with Shadow ORZ. If you’re not in a good position to do either, you should block. If they throw one from full screen, you have both dash and teleport as good options. She can dash under multiple projectiles if your timing is right - may require two dashes. Does not apply to ARIA’s bass body.
And then there’s jumping - risky but will avoid them, and Hisako has good options (great buttons with huge plus frames, Air-ORZ) in the air.