(From Wikipedia)

(Warning Spoilers Ahead)

As Ultima National Resources' in-house counsel, Claire Maddox is Walter Kendrick's chief adviser. A legal bulldog who thrives on confrontation, she is a worthy adversary to Patty Hewes. But Maddox's devotion to Kendrick is challenged as she is drawn deeper and deeper into the web of his conspiracy. She is also romantically linked to Daniel Purcell. Claire saw an opportunity to oust Kendrick when she discovered he had been lying to her, but he used her history of sexual indiscretions to have her her thrown out of the company before she could oust him.