Karl

Karl is a user on the forums, who interacts with Sam several times over the series.

Appearances

 * SBR 1.26: Enigma, Karl points out on the forums that the way of find the Flat Cap Man (‘If you seek him, but do not search, then you’ll find him’), sounds like a case of surrendering agency.
 * SBR 1.29: Over and Over, Karl is mentioned amongst some users that reminded Sam of the letter that Madame Marie received from Nagisa about the Algiz formation.
 * SBR 1.30: Eudemonism, Karl types a response to Sam in real time, and tells them that he can't delete the tread on the forum about the Flat Cap Man as it wasn't created by Sam or Madame Marie, it was created by the users in response to Sam's questions.
 * SBR 1.39: Lament, Karl aids with Sam's group séance.

Trivia

 * Karl is very loosely based on Karl Marx, and was named from a conversation in the Faithful Listeners Discord Server, which can be joined here.