The Fortune Teller is a character found near the entrance to the big top in the Meat Circus that allows Razputin to redeem his items that he cannot normally redeem after reaching The Point of No Return.
The fortune teller looks similar to the Knife Thrower, only female, and them she is found in a fortune telling machine.
After the point of no return, she is the character that helps you rank up. She collects your PSI Cards and Figments and pledges them into ranks, and collects your Brains and increases your Mental Health like Ford Cruller does before you entered the Point of No Return. After entering the Meat Circus she asks you to redeem your collectible items by showing a pop up message in the game.