I figure that the aliens have the ability to inhabit human bodies, so they would have to be smaller, with the shape of a tentacle or a spider or something. I figure there are enough of them to almost take over the entire town. Part of the problem will be battling possessed humans without hurting them. The runaway alien with them might look more human. Maybe he or she is just a teen or a child? I am going to work on a post for the landing site tonight, but I have to go to my son' science fair soon.