Heather Brooks is one of the five new surgical interns introduced in the ninth season. She had a brief sexual relationship with Dr. Alex Karev. She first bounces around from specialty to specialty but it is soon discovered that she has very fast and steady hands, which are an asset and impress Dr. Derek Shepherd, who encourages her to focus on neurology. She has a bunch of quirks that make other interns and residents find her annoying at times. She swallowed a marble as a child and this becomes the focus of a test run of a new full body scanner at the hospital.