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The Gluten Demon was the disguise of Francilee Jackson.
The Gluten Demon was a large, round, demonic anthropomorphic pig, hulking around as if it was a sumo wrestler. It had red skin and pointed ears, along with long horns and a pair of teeth sticking out from both sides of its mouth. It also has what seemed to be two black bands linked together on the chest with a flat skull and glowing yellow eyes.
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Powers and abilities
It appeared to be able to eat large amounts of gluten nonstop, and the costume stretched out as Francilee ate.