Miranda Dawkins

Miranda Dawkins was the Eighth Doctor's adopted daughter and the supreme ruler of the universe in the far future.

Biography
Miranda's father, the Emperor, was a Time Lord: the last survivor of a catastrophe that ravaged Gallifrey. On the night she was born, the Emperor was assassinated. Two members of the Imperial staff spirited the infant Miranda to Earth in the 1980s to keep her safe. They were discovered, and when her "parents" were killed by the rebels, the Eighth Doctor adopted her. (EDA: Father Time)

Miranda had at least one adventure with the Doctor during this time. (EDA: The Gallifrey Chronicles) He used to sing a song about windmills to her. (EDA: Grimm Reality)

The Doctor raised Miranda until she was sixteen, when the rebels returned to kill her as well. Miranda killed the leader of the rebels and fled. Three years later she was discovered again, but reached an understanding with the rebels after she rejected her would-be captor's assertion that strength would always prevail. She returned to the future to inherit her title as "supreme ruler of the universe". (EDA: Father Time)

Before news of her coronation had time to spread, there were many attempts on her life. The commander of her forces, Prefect Ferran was plotting to use her bloodline to open the Librarinth. Miranda ruled from her father's throne at the Needle. (Miranda, Sometime Never...)

Miranda returned to the Doctor's life many years later with a daughter named Zezanne. She sacrificed herself to avoid being used as a hostage, saving the Doctor from sacrificing himself. (EDA: Sometime Never...)

Personality
Miranda was incredibly gifted compared to the humans on Earth she grew up with. She often had mood swings in her teenage years that caught the Doctor off guard. (EDA: Father Time)