[@MiddleEarthRoze]
I have a few things. 

First, you can't just skip university/college and go straight into a medical PhD-you still got to do the work, even if you are a genius. He'd have to go to college first, get the medical degree and then go into a medical PhD. I've gone to double check that this is the same in america as it is here. 

secondly

"After de-constructing and refitting a Valkyrie suit to something that would be of more use to him, Virgil lined the entire thing, helmet and all, with an improved Faraday Mesh. The technology involved makes him immune to energy attacks, electricity attacks, and EMPs for a certain amount of time. Obviously, a constant barrage will cause the mesh to overload, leaving him vulnerable until the suit repairs itself."

This seems like an overpowered passive to have. Even Bastion only has a shield in sentry form. Or ultimate form. Its basiclly having him immune to hacking in that suit, and it makes some characters useless when attacking him. Yes, it has a weakness, but if he's fighitng with comrades, his opponents aren't going to have much of a chance to disable the suit. It essentially makes him able to take down anyone before they can even do minimal damage on him. 

Everything else...I can't really see nything else, although I'll have a better look at it later at home, seems alright. 

Except:

"A stunning grenade, but just a wee bit more effective than your average one. It assaults the senses, targeting the inner ear by hitting frequencies more than a human can handle; symptoms include dizziness, nausea, and inability to focus for a certain amount of time. It's not too kind on the eyes either, just as a regular flashbang works."

From a medical and nursing point of view, to have the inner ear targetted, and at such a grequency that the human ear can't handle it generally means you're going to blow out ear drums. You're going to do permement damage, and essentailly take out your opponent in one blow, because its not something you can just bounce back from. Yes, those symptoms are correct. But it will be on a much larger scale-a delibilitating injury that takes opponents out of battle for...a good looong time. And I could find the research that would support this, but a} I'm too tired and b] Uni's internet sucks.