[He's a little distracted by the sword in her chest. Most of the creatures at the lab could withstand a stab like that, but it's generally a bad sign if the creature doesn't bother removing the weapon.(Aka PM is a badass)
Of course other things sort of trigger in his head, memories, flashes of unwanted things from that time as his mind tries to make heads or tails of what she is. He presses a gloved hand to his face and winces, fighting off the images and voices. At least until PM's greeting silences his brain.
He blinks, realizing it spoke and just how... friendly it was. There is some hesitation, not really out of fear but surprise as he waves hello.]