At the hiss from his guardian, Ed whips around, spots Ember, and calls out, "Dresden! Look out!" Hopefully in time.

The moment Cipher Nine spots her, he draws his rifle, takes aim, and fires several steadily timed shots at Ember, kneeling behind the remnants of one of Ed's stone walls for cover. Not a typical strategy for him, but as quick as he is, he can't get over to her with his knives quick enough to intercept her.