And the prisoner chose him for his confidant (we have his own word for it) and he frightened him into consenting at last to act as a spy for him.
There are no more uses of "confidant" in the book.
Show samples from other sources
It all seemed very noble—and frustrating to those involved—until Mark came across an exchange between Mr. Spilker and Ladena Lichliter, who seemed to be his closest confidant, that sent an icy chill along his arms.
James Dashner -- The Kill Order
In the cereal aisle or frozen food section, Gabby couldn’t seem to avoid him, and he became something of a confidant.