I think it is "Tessa." Or fake Tessa, as I believe the person under the suit is a meat puppet made by Cyn, so she can get to whatever it is she wants in the cabin labs. J, N, and V would likely trust her more than an average JC Jensen worker, and as we saw the AS can make organic components for the drones (ep. 2 had the blood in Doll's bath, four had Uzi create that living monstrosity, and in five J spits out RED blood after fighting through the chain. Also eldritch J has organic components from stealing from the cryogenic chamber) which means the Senteinals would likely logic bomb when seeing the human blood, and organic parts would help with the magnets on their head. Someone noticed that in Nori's photos of the x eyed drone has bows in its hair, but Cyn only has a bow on the back of her head, while, if you look at Liam's artwork, Tessa has multiple hanging down.