Of course, there are Star Children, who are souls from other worlds in human bodies, and possession or walk-ins can and does occur, but all this is not new to human consciousness. Contrary to some of the disinformation, there are no alien life forms living in human society, as human lookalikes or otherwise. It is frequently mentioned that the Pleiadeans look very much like humans, as well as the Nordics and Sirians. Where the similarities immediately impress humans having contact with these hominoids, there are differences that would stand out should they simply set up housekeeping in the neighborhood. The eating habits would be the first to be noticed, as where genetic engineering of hominoids has resulting in similar looking forms, the worlds the hominoids had to adapt to differed greatly.
Nordics eat little, having learned to adapt to lean times on their world.
Faced with what humans consider a meal, a Nordic would appear a picky eater. This would be true of Pleiadeans as well as Nordics, who would not simply get sunburn, but would develop symptoms of radiation poisoning as well.