Miyako quickly noted the Primordials erratic combat style diminishing as the fight went on and the two of them moved further into the bamboo, her wondering just how thick this field actually was. Given where they were she hadn't expected it to be this ridiculous or deep, though there was nothing she could do about it now. Perhaps it was the Primordials magic, but it didn't seem likely. 

Her eyes widened as she got it in view at last, only to see it pulling back the bowstring to a frankly ridiculous degree, preparing a powerful arrow. Well, that wasn't good, and she had a feeling that she wouldn't be able to block it or deflect it, for fairly obvious reasons of how fast it would be moving. Well then, fine, she could handle that. This thing would learn why it had been a mistake to mess with her.

She moved forward, but not at a breakneck pace meant to outleap the arrow. Instead she waited until it had been unleashed before hitting the deck, falling to the ground as it whizzed overhead, wind blowing against her back and shattering bamboo in the process like nothing's business, before she got back to her feet with a flip and then sprang forward, jumping over the trap hole in the process, which she barely even registered as she moved to engage the thing at close range, blade swinging to take out it's bow and then kill it. Score one for the Greatest Magical Girl in the World, she supposed.