Alice Coltrane

Alice Coltrane was one of Donna Noble's friends. In an alternate timeline she was seen looking at Donna Noble's back and saying, "There's something on your back." At one point she claimed to have seen the ghost of Earl Mountbatten at the Boat Show. She was presumably killed when the Titanic crashed into Buckingham Palace, destroying London. This was later negated thanks to Donna's actions, meaning that the Titanic did not crash into London and Alice never died. (TV: Turn Left)