The Invisible girl

He always thought he was alone. New companions coming, then leaving, then alone- repeat. But he wasn’t. Always, throughout his entire life, there was someone else. They were there at the burning of Galifray. At the taking of Manhattan by the angels. At the asylum of the Daleks. He thought that they were all dead. But they weren’t. One other was left. And she was there with him. The whole time. But he couldn’t see her. She was the invisible girl. She was the light within. The lonely one. She was The Eclipse. And she was dying.