Ah, my bad then.
Her second attack is a test in microtapping, and each of the formations are aimed. When you start, you want to stay still until the red arrows start moving for the second time, and move only a bit to the side. Make sure you dodge the blue arrows as you do this - they are aimed too but follow a different formation, so you may need to make a second movement. What I like to do is after dodging the first duo of red and blue arrows, dodge the second in the opposite direction, ending up back where you started (this leaves you right in the center of the second blue wave, which has a gaping hole in it). The third wave, which is like three sets in quick succession IIRC, takes careful streaming to one side. I don't know how well I can describe the pattern of blue arrows you need to dodge here, but I advise making sure you stay within as open a space as possible. I hope that helps.