The Emperor

The Emperor was the ruler of the universe in the far future.

Biography
For a thousand years the Emperor reigned over the entire universe, controlling time and space travel via a ruthless secret police force and crushed any rebellions before they happened. The Emperor conrolled the Senate of his empire through fear. The Emperor ruled from his throne on the Needle. (EDA: Father Time)

Endpoint was one of the planets in the Emperor's empire. (EDA: Hope)

On the night of his daughter; Miranda Dawkins' birth, the Emperor was assassinated, causing the entire empire to fall into chaos overnight. (Miranda)

The Emperor was seen in a vision by the Eighth Doctor and Marnal as one of the last surviving Time Lords after the destruction of Gallifrey. In the vision, the Emperor was holding his daughter in his arms. (EDA: The Gallifrey Chronicles)