Beforehand Mrs. Bulstrode had thought that she would sooner question Mrs. Plymdale than any one else; but she found to her surprise that an old friend is not always the person whom it is easiest to make a confidant of: there was the barrier of remembered communication under other circumstances—there was the dislike of being pitied and informed by one who had been long wont to allow her the superiority.
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.