Doesn't Steph Irson have 'some of body parts' replaced (or in symbiosis?) with the grey goo nanobots? I mean, after her mission on Tarkus.
Of course, I think it'll be hard to reason any future reverting. Maybe those parts replaced by nanobots are irreversible like GaloMax goo or Mimbrane-occupied lower body.
Well, I envy her nanobot-implanted iris and pussy.