In season 6, after declining a fellowship in Pediatrics, Bailey starts as an Attending in General Surgery. She begins a relationship with an anesthesiologist from Mercy West, Ben Warren, who joined the staff after the merger between Seattle Grace and Mercy West. In the final of the season, a gunman enters the hospital, believing that the staff had failed his wife. He shoots several people, including resident Charles Percy. Due to an order to shut down the elevators, Dr. Bailey is unable to get Charles to an operating room to perform the surgery he needs. Charles dies in Miranda's lap. As Miranda comforts him, Charles says, "You were always my favorite, I thought you should know".