Brain injuries are one of those things where it tends to be all or nothing,
...or appears to be nothing but ends up being a problem, but I somehow doubt that now she's under treatment it'll be that case (if any signs appear, it'll be swooped upon and whatever needs to be done will be done immediately), and that usually is relevant only to those that hit their heads, thought they were Ok and eschewed treatment and then some time later get problems...
So, pedantry aside, I'm sure they're doing all they can, which means it'll be as good a result as you could expect. (Also atheistic/agnostic/apatheist, here, so my best wishes for the outcome are what you'll be hearing from me, over the aether. Any actual
God worth his pillar-of-salt should be willing to treat that as a prayer, though, and Pascal-be-damned.(Please put any disagreements to my philosophy might in another thread, and/or PM me to tell me where I'm wrong. I'm just explaining myself, not wanting to derail things!)
My Dad's in hospital at the moment, FYI. Not a brain injury, just age and blood-thinning medication meaning that a rather routine accidental bump meant that he needed a bit of extra care (and reversal of the medication, and a bit of blood-letting from where it shouldn't have been). They spent a long time (i.e. thoroughness, not tardiness, knowing that in sorting him out they'd be breaching those artificial and arbitrary 'target' times set to make care 'better') taking care of him in A&E a couple of weeks back, got him onto a local ward for initial recuperation, and into a specialist hospital this week for a more in-depth follow-up procedure once things had stabilised. NHS FTW! No complaints here about our apparently 'broken' healthcare system.
He's an old man (approaching 90), but looks younger than other patients who are maybe around 60 and he's pretty active and fit, normally, so his biggest issue right now is boredom and inactivity and the direct consequences of the preventative/investigative treatments. So don't let me dilute the call-of-prayer towards OP's friend. General good wishes are more than enough and you can leave them unvoiced if you don't want to further clutter this thread.
Bones and ligaments can be repaired, so don't stress over that.
"We can repair her... We have the technology!".
(Yeah, I know, but I just felt the need for a mood-lightner, after all the contemplation. A positive attitude in front of a patient is also pretty efficacious in aiding recovery. Well, when added to whatever healthcare is essential. When you do get to visit, even if they're not apparently conscious, be as upbeat as you feel you can be. They may actually be listening, or at least absorbing the general mood and internally reacting to it, so a little positivity can help.)
 For trying to cynically play the system...
 Albeit that those that need to go to hospital might be somewhat self-selecting to be the more fragile-looking ones, and there's a 20yo in his current ward who looks like he could be 30-40...
 Ironic, I suppose, that with both me and him being atheistic, I'm happy with what are essentially 'silent prayers' by another name. Do what you think, though.