Claude is a contractor who works for The Syndicate and was sent to capture Yin, appearing in Darker Than Black Gaiden.

When Hei first meets Claude, he puts Hei and Yin under an illusion, so to them he looks like Amber. Yin notices this, and after seeing Hei talking with the woman, and later feeling distant from him, Yin makes use of her observation spirit that night. Although Hei had woken up and stopped her from doing anything drastic, Yin saw enough to be able to say that the woman was not Amber, but was indeed a Contractor. Realizing he was found out, Claude kidnaps Yin that night.

The next day, as Hei was checking out of the inn, he heard from the manager that the person who looked like Amber was actually a man. Realizing that the woman he had seen was an illusion, Hei ran back to his room only to find Yin gone. He was able to track down Yin in a warehouse. He was then attacked by the Amber look-a-like. Hei is saved when Claude suddenly turns the gun around and shoots himself in the head, with Yin’s observation spirit appearing behind him. Hei was then able to kill most of the rest of Yin’s captors and save her. Unbeknownst to him, the person who looked like Amber wasn’t dead and instead talked to a certain dog Hei saw earlier about Yin’s hastened evolution and how she will soon be uncontrollable by anyone, including Hei.

Claude's core ability is mind control. He can also control what people see, putting them under illusions. He was even able to trick Hei into thinking he was Amber.

Obeisance: His obeisance is to eat a petal of a flower.