Darius Fontaine is the founder of Inversion Therapy, which attempts to help people conquer their fears. Fontaine wrote the book "Fear It? Do It!", although he has no qualifications for this. Lazlow describes him as 'a former sociology professor' on WCTR's Entertaining America, although he is a qualified gardener. He hates religion and in 1992 has an on-going feud with Cris Formage, the Epsilon Program's founder and cult leader, and Lazlow. Lazlow in 1992 had a restraining order against Darius after he encouraged Lazlow to sleep with his grandmother, although Lazlow slept with his mother and was almost imprisoned.
- Darius may be related to Beatrix Fontaine, a fake psychic who apperared in Grand Theft Auto IV, or Harlan Fontaine, the main antagonist in L.A. Noire, another Rockstar game.