Claire Simms is the associate who joins the Boston office of Crane, Poole & Schmidt in episode 3x02 [New Kids On The Block]. Claire was convinced by Jeffrey Coho, against her better instincts, to transfer with him from the New York office and she is still trying to get comfortable in Boston.

Clearly not adept at endearing herself to new acquaintances, Claire has the habit of repeating the word "Ick" to express her disapproval of something. Despite her abrasive manner, Claire did demonstrate that she has a softer side with the sympathetic way in which she handled cross-dressing client Clarence (sometimes Clarice, Clavant and on one ocasion Oprah Winfrey) Bell, with whom she gets romantically involved. Claire's frank public comments give her a veneer of toughness and tactlessness, however her thoughts expressed in private show acute observation and sensitivity. She does not suffer fools nor men who appear to try and use her. Clarence is most likely the reason she decides to stay in Boston even after Jeffrey Coho "abandons her" and leaves the firm.

Besides working at the New York office of CP&S, Claire also worked previously as a Supreme court clerk.