Madelle Bert, short for "Madelline Bert", is a Mandelbrot-like dream demon.
Madelle is very polite and formal in terms of speaking and gestures and has a much quieter and serious personality in contrast to the more energetic and jokey yet loud-voiced and impolite Bill. Despite this, Madelle wants to take over the world like Bill, although by "the world" fae meant just the Planet Earth. Fae wanted to own Earth because fae wanted to fix the damaged environment and prevent bad actors from doing bad stuff.
Deep down, Madelle is somewhat insecure and shy, and sometimes gets embarrassed. Fae also somewhat has trouble with making friends with fellow demons.
Madelle possesses high amounts of intelligence (higher than Dipper and Stanford), however most of the memory and intelligence on everything (except magic spells) was hindered by the fact that faer brain is currently turned into stone. To unlock faer intelligence and turn the brain back into the original state, one must successfully fulfill one of Madelle's deals, which are extremely hard to even start one because of the way to start it.

Transaction

The transaction usually involves chanting. To start a deal with Madelle, one must simply request a deal to faer first. Then, fae will choose a random chant that is usually hard to pronounce. One will then read the chant aloud backwards four times in a row. If one fails to read the chant correctly or fulfill the deal, Madelle will invoke extremely loud noises to the victim's ears. So far, every individual who tried to start a deal with Madelle failed and had their ears or sense of hearing broken or lost. No one has successfully started a deal with faer yet, due to the difficulty to even start one deal.
No one knows the consequence after successfully fulfilling Madelle's deal. Bill is known to possess people after making a deal, but how Madelle does to a person after making a deal is unknown.

• Personality: Quiet, very polite, formal, serious, mysterious, insecure, shy
• Likes: Books, monochrome things, harsh noise (and silence as well), meditation, magic, "radio noises", travelling, fragrant smells
• Dislikes: The fact that faer brain is turned into stone, humor, bad smells, nothingness (of everything)
• Strengths: Madelle Bert possesses high intelligence as well as extensive magic spells. However, they are very limited.
  • High intelligence: Madelle has a very high amount of intelligence, and is much smarter when compared to Ford Pines. However, due to faer brain being turned and made into stone, Madelle can't access some of the intelligence, most of them being very useful for world domination. To unlock most of faer intelligence, one must make a deal with Madelle, which is impossible to start even one. Most of Madelle's knowledge can be useful for world domination. What or who made Madelle's brain turn into stone and when did it happen is unknown.
  • Magic spells: Madelle has magic spells and powers, most of them involving sound. They are rarely used, however, as Madelle does not want to "misuse them" and is not ready to make use of the powers more. The most used spell involves playing an extremely loud sound that can break someone's ear, which is around 250+ decibels. The spell is most often used when someone's deal with Madelle is failed or rejected.
• Weaknesses: Madelle's brain is turned into stone. To turn the brain back to normal, one must make a deal with faer, which is impossible to even start one.
• Dream Demon stuff:
  • Transaction: Chant - Involves chanting a hard-to-pronounce phrase backwards.
  • Punishment for deal failure: Playing extremely loud noises and sounds to break a victim's ears
  • Item: Book (Not shown often on-screen, but is there)
  • Flame color: Black
  • Based on: The Mandelbrot Set

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