confessor

noun

• 1a priest who hears confessions and gives absolution and spiritual counsel: she sent for her confessor because she was in mortal sin
• a person to whom another confides personal problems.

• 2a person who avows religious faith in the face of opposition, but does not suffer martyrdom.

• 3a person who makes a confession: if one prisoner confesses and implicates the other, the confessor will go free as a reward