Mia is psychotic, but not stupid. She's got kick ass gear... or at least had kick ass gear until Xi melted her armor. She normally wears a helmet with full face covering too, but, well, she liked Kevin.
Just let Prophet get a hold of you and ask him to do it... lets just say its coded into your genetic code. You likely can't change the flaw. Someone wanting to use you to heal themselves has to know about it and then attack you and hit exposed flesh. The first part is going to be pretty commonly known after a while; the second, well, don't run around with exposed skin, get a mask, etc. Mind you, doing that means you need to spend a half action exposing skin so you can heal...
Lots of ways to minimize it though. Buy BDB. Improve your dexterity. Buy armor. All, of course, could be circumvented. Oh yeah, and you could just turn yourself over to Prophet and get him to change your genetic code...
Dalamar
You'll get your gadgets once you get back to home base. I describe it as a harness, something with a belt and shoulder straps and wrist guards that can hold everything an aspiring gadgeteer could possibly need and something easily worn over your armor. If you have another idea on it, let me know.