User blog comment:ChromastoneandTabby/BTFF RPG Video Demo Alpha 0.1/@comment-26816267-20151208005525/@comment-1824169-20151208014337

Actually, each user has been implemented, it's just that only the four active characters at the front of your party show up on the map. Kinda weird, but it's that way with all RPG Maker games.

Each user does have an assigned alien, which were selected at random so as to switch things up a bit. The person that's using Gemini is The Awesome Jack. You find a full list on the RPG's page.