Cassandra

Lady Cassandra O'Brien.Δ17 is a fictional character in the British science fiction television series Doctor Who. Portrayed by actress Zoë Wanamaker, Cassandra is a human who has undergone so many plastic surgeries in an attempt to become more beautiful that she is now just a stretched piece of skin on a frame. Cassandra first appears in the 2005 episode "The End of the World", where she attempts to sabotage a viewing party for the destruction of the planet Earth in order to obtain more money to fund further surgeries. Cassandra is seemingly destroyed, but later re-appears in the 2006 episode "New Earth", where she possesses the body of the Doctor's companion Rose Tyler. Cassandra is eventually forced out of Rose's body into another body, which begins to die. The Doctor takes Cassandra back in time to see her past self, and she dies in her past self's arms.