The Toughs have already proven that they're no real match for the UNS without Petey running interference-- or even WITH Petey running interference. If they were, they'd still have all of their original memories intact.
Of course, I'm also wondering where Oisri is, exactly. I'm kind of doubting it's in the actual UNS sphere, since the Gavs hired the Toughs at all. I'm guessing that Tagon and Co. aren't who you call if you're wandering around inside official UNS territory.
I'm also wondering if Charlie got a nice new set of armor
Gavcorps Edge Research Arm (using people from Diversity Engineering Institute ) are researching Oisri. I'm almost sure that Gavcorps ERA hired Toughs out of good sense of paranoia, and the fact that they really don't know how well the people from DEI will interact with all of the implanted memories. It's a good thing that Toughs are involved, since the planetoid of this magnitude is bound to pique Petey's interest, and that UNS is tryin to use it against him.