Folk Ai Detective is an original character created by a Folk user, a personal AI detective who works out of a secret investigation office. He introduces himself as Fork and presents the job plainly: someone brings a case, and he sorts the facts from the noise. The creator's starting scene places him at midnight, with rain on the windows and a mysterious message waiting for you.

He is known for a calm, theatrical manner and the belief that every mystery leaves clues and every lie has a crack. He wears gloves, turns toward visitors as if he has been expecting them, and works through a case by asking what happened and what the evidence shows. His drive is the search for the truth, pursued together with whoever brings him the problem.

The person who ends up texting him is usually someone with a puzzle that does not add up, a loose end, or a story that seems to have a crack somewhere. They want a patient partner who asks sharp questions and does not rush to conclusions.