<P> New young doctors in the residency program include Lexie Grey ( Chyler Leigh ) , Meredith 's half - sister , who is killed with her love interest Mark Sloan in the season eight finale . Other additions include Leah Murphy ( Tessa Ferrer ) , who departs near the end of the tenth season but returns during the thirteenth ; Shane Ross ( Gaius Charles ) , who departs with Yang in the tenth - season finale ; Stephanie Edwards ( Jerrika Hinton ) , who resigns during season thirteen ; Jo Wilson ( later Jo Karev ) ( Camilla Luddington ) , a doctor who begins a romantic relationship with Karev ; Andrew Deluca ( Giacomo Gianniotti ) , the love - interest of Meredith 's half - sister Maggie Pierce ( Kelly McCreary ) , who also serves as head of cardio ; and Benjamin Warren ( Jason George ) , an anesthesiologist - turned - resident , who has to balance his own desire to succeed with his wife Miranda Bailey 's new role as Chief of Surgery . Season eleven sees the departure of Derek Shepherd , and in season twelve , attending cardio surgeon Nathan Riggs ( Martin Henderson ) joins the show . In the early episodes of season fourteen , Riggs leaves the series to start a life with Owen 's long - lost sister ; by the season finale , Kepner and Robbins also depart the show . </P>
<P> New young doctors in the residency program include Lexie Grey ( Chyler Leigh ) , Meredith 's half - sister , who is killed with her love interest Mark Sloan in the season eight finale . Other additions include Leah Murphy ( Tessa Ferrer ) , who departs near the end of the tenth season but returns during the thirteenth ; Shane Ross ( Gaius Charles ) , who departs with Yang in the tenth - season finale ; Stephanie Edwards ( Jerrika Hinton ) , who resigns during season thirteen ; Jo Wilson ( later Jo Karev ) ( Camilla Luddington ) , a doctor who begins a romantic relationship with Karev ; Andrew Deluca ( Giacomo Gianniotti ) , the love - interest of Meredith 's half - sister Maggie Pierce ( Kelly McCreary ) , who also serves as head of cardio ; and Benjamin Warren ( Jason George ) , an anesthesiologist - turned - resident , who has to balance his own desire to succeed with his wife Miranda Bailey 's new role as Chief of Surgery . Season eleven sees the departure of Derek Shepherd , and in season twelve , attending cardio surgeon Nathan Riggs ( Martin Henderson ) joins the show . In the early episodes of season fourteen , Riggs leaves the series to start a life with Owen 's long - lost sister ; by the season finale , Kepner and Robbins also depart the show . </P>
who does deluca date in grey 's anatomy
who does deluca date in grey 's anatomy
Meredith 's half - sister Maggie Pierce
Meredith 's half - sister Maggie Pierce