Looking at the strip again, Alice is actually is not entirely under cover. You can see a bullet impact in front of her right knee. I think that she's just sheltering from the worst of it but isn't worried about taking a few hits. Basically, she can handle being hit by one or two rifle-calibre bullets without suffering significant damage but being hit by a sustained burst from a minigun is an entirely different matter.
I've got a feeling that Alice is going to get in a fight with their assailant and, after she disarms them, they're going to stop and say something like: "I'm glad to see that you haven't lost your touch, Sentinel."
Alice will reply: "I'm not that person, any more, Templar. I haven't been for millennia."
The assailant will smirk. "Keep telling yourself that, Ali. Keep telling yourself that. Now, what brings you to my sector?"