Huh? Halo? Her implant wasn't from Halo!
It was from WAAAY far bac, way before Halo. And I won't go in to detail, but she got that implant that was only meant fer her to breathe in space. But the chemicals also gave her supernatural defects. It's useless right now when she's on Oddworld but it had somewhat of some juice left over in it to partially heal her wound.
She got lucky...