The main antagonist in Season 1 and make his return in Season 2 in Weirdmaggedon. "Li'l" Gideon Charles Gleeful
(born early July 2002 in Gravity Falls, Oregon
) is a fraudulent child psychic, whose hunger for ultimate power motivates him to manipulate and intimidate others into giving him what he wants. A sworn enemy of the Pines family
, he serves as the series'
main antagonist throughout Season 1
, until his eventual defeat and incarceration
in the last episode
. He was largely absent from the first half of Season 2
, but returned during the later part of the season.
Gideon Gleeful (c) Alex Hirsch