(Kristen Schaal): Energetic, optimistic, and often focused on "summer romances".
(Alex Hirsch): The twins' "con-artist" great-uncle who runs the Mystery Shack , a tourist trap filled with fake oddities. Plot Summary Review: Gravity Falls Season One | A Reckless Venture Gravity Falls Season 1
: Alex Hirsch, who based much of the show’s lore on his own childhood experiences and birthdays (represented by the recurring number 618 ). Main Cast : (Kristen Schaal): Energetic