Montreal Biodome
Since the armour that both aliens were wearing wasn't very thick, Kuki would likely have no difficulty seeing through it. Underneath, the aliens had a hard exoskeleton consisting of scale-like plates, segmented to not restrict mobility. Beneath was a layer of fairly tough skin, and under that was muscle, fat and an endoskeleton that would seem less tough than the exoskeleton, though not by much. Finally, the claws on their fingers and feet consisted of a material similar to that of the exoskeleton.
The aliens' heads bore two pairs of eyes; one on the front and one on the rear of the head. The front pair were closer together, while the rear pair were further apart, like a prey animal's would be. Kuki might be able to identify that their colour-vision was mainly in the blue and green range of the spectrum. Finally, their eyes had two sets of lids; one was similar to a polarised lens and the other was made of the same material as the exoskeleton.
The aliens had no external ears or nose, or any external genitalia leading them to seem androgynous on the surface. Internally, however, Kuki would see that one was male and the other female, and might identify that they were egg-laying animals.