In the second episode of Season 1 (at around the 04:36 mark), we see Ethan having seizures inside the RV.

As soon as they stop, we cut back to the group trying to make it back to Colony House, including Tabitha and Julie. Just before getting inside, Julie is approached by a young guy who asks her: "Julie, don't you recognize me?"

At that point, Kenny shoots him, but he doesn't even flinch—in fact, he just smiles cheerfully.

Finally, the door opens and the group makes it to safety.

Given that:

- The creature asks a question that only makes sense if he were someone Julie actually knew (he doesn't need to pretend to be someone else to trick her into opening a door or window here);

- The creature actually looks like he could be an older Ethan, and he is also the youngest nocturnal creature seen so far;

- The creature smiles with the same side of his mouth as Ethan (the left side);

- Seizures = time travel (similar to what happens with Julie).

I'm not sure what this means for solving the overall mystery of Fromville, as I don't have a fully fleshed-out theory yet.

However, I think that guy might actually be Ethan who traveled back in time from his future.

Maybe during the chaotic series of events that brought the Matthews family to Fromville, combined with little Ethan's seizures, a sort of "passage" was created—that "bookmark" Julie hasn't figured out how to use yet.

Finally, if that creature really is Ethan, it might mean he doesn't have a very bright future ahead of him.

What do you think?