How about "Starry" and "Night", since it fit with their birthplace look like when night come and timebirth(the time is night rigth? or I remember it wrong?) is at night rigth?
Thank you for the chapter.
As for names: Cat1 and Cat2.
It worked well enough for my own cats, because the most pressing matter is not naming the cats, but trying to distinguish them from one another, when they are literally the same.
if the pet is use just to be extracted than the name won't be a matter. but if they will be a good support for the MC than it will be good if name it simple and easy to remember.
thanks for the second chapter. nice