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Callie Torres

Played by: Sara Ramirez in Grey's Anatomy

Introduced in the second season, Dr. Callie Torres is an orthopedic whiz. She loves the challenge of overcoming a medical mystery that no one else can, from reconstructing limbs and joints out of titanium to developing synthetic cartilage. She also enjoys dancing around her apartment in her underwear. Callie is initially a love interest for George O'Malley, whom she eventually married, but her love life later takes a completely different turn when she enters into a lesbian relationship with a new doctor at the hospital. Callie also develops a particularly unique relationship with Dr. Mark Sloan. Callie is a passionate and hot-blooded doctor who doesn't mind ruffling some feathers in the male-dominated profession. Source: IMDB