#17. Dr. Sydney Heron
Who Played Her: Kali Rocha
First Episode: Season 2, Episode 15, “Break on Through”
Last Episode: Season 4, Episode 8, “Forever Young”
Crime Against the Fans: Dr. Heron was first introduced when Dr. Miranda Bailey went on maternity leave, as Bailey’s interns needed a resident to guide them. From day one she was cringingly overenthusiastic and everything that Meredith and Cristina couldn’t stand.
To be honest, she wasn’t a horrible character. It was her bubbly personality that was just too much for many Grey’s Anatomy fans. However, some did start to warm to her in later seasons.
Dr. Heron just disappeared into the Grey’s Anatomy black hole. There was never any mention of what she was doing next after she lost out on the position of Chief Resident to Callie (and then later Bailey).