Daniela Grace is a minor recurring character in the Monk book series. She first appears in Mr. Monk Gets on Board, where she's Natalie Teeger's Alcoholics Anonymous sponsor, despite Natalie not being an alcoholic. Adrian Monk realizes that Grace and her friends Ruth Weingart, Sondra Winters, and Lynn Sung are going to murder Darby McGinnis, his roommate. McGinnis is a surgeon who had operated on their friend Samantha, but Samantha died not long afterwards. Grace and her friends were going to get their revenge by sabotaging McGinnis's railing (as well as their own), but he survived. When they were about to kill McGinnis, Monk and Natalie stopped them and convinced them to get their revenge the legal way, by getting McGinnis' license revoked.
Grace also appears in Mr. Monk Is Open For Business, where she is Monk and Natalie's first client. She hires them to prove that her client, Henry Pickler, didn't kill Esteban Rivera, a drug dealer.