Having had the, perhaps misguided, foresight to transform on the way over, Crystal had no impressive metamorphosis to dazzle the Officers with. Instead, she waited and watched as her teammates fought, using their Elementum and Gladius magnificently each. And before she could even examine the coming machines, two were down. One certainly at Selma's hand, another likely at Aoife's, with help from Rivka. She supposed she should probably act, but... "Is it really only these three? Surely not."
Or rather, surely not as they were now. There was always a distinct chance with machines that there were other functions than those visible on it. You wouldn't guess most mechanical purposes without seeing them in action, after all. "Sufficiently advanced technology is indistinguishable from magic." That was the quote, wasn't it? And for those with magic, the Ars Magi, that saying would be much more terrifying than it would to a normal person if true. Knowing the depths of magic only made Crystal more worried about the ease with which her teammates defeated these drones. Sure, she was proud to be on their team, to be standing alongside such wonderful Ars Magi, but perhaps it was best to simply stay in the back for now.
If all five of them used up too much of their reserves, then a secondary threat would decimate them. Chie had run the dinner bell, so it was certainly time to eat, but... She doubted that this was anything more than an appetizer. And while she trusted Selma's ability to grasp the battlefield, there was always another possibility; that the drones took more from their namesake than simply their autonomy. Instead of joining the fight in an offensive manner, perhaps she could kill two birds with one stone? Distract and survey.
Crystal went to the nearest building and looked up at it. It appeared to be high enough to get a good grasp on her surroundings, so she expended a small fraction of her Nox reserves to form platforms of ice alongside the building out of the falling rain. It took only a moment for her to have a path up, which she took quickly, rising to the roof where she stood and looked out upon the mission area. If there was even a single airborne drone, she would alert her team and draw its, or their, attention so that she and her team could begin the process of violently dismantling.
And if not? Well, she could always use some target practice, being mostly suited for close-combat, and there were surely other threats than these three nearest.