Sadie Harris
Introduced as a surgical intern who has an old companionship with the series' protagonist Meredith Grey ( Ellen Pompeo ) , she eventually forms a friendship with Lexie Grey ( Chyler Leigh ) , and departs after it is revealed she cheated her way into the surgical program . 
<triplet> Meredith Grey <subj> Ellen Pompeo <obj> performer <triplet> Lexie Grey <subj> Chyler Leigh <obj> performer