Susan Who
From Tardis Wiki, the free Doctor Who reference
This topic might have a better name.
It should be called Susan Who since her full name was given
Talk about it here.
Susan Who was a delusional creation of Martin Bannister.
When Bannister was in a nursing home, he began to confuse fantasy and reality. He started to believe he was Doctor Who, the character he had written a television pilot about decades previously. In the fantasy, he travelled in his TARDIS with Susan (based on his second wife Amy), Ian (based on his son Philip) and Barbara (based on his nurse at the home). He eventually succumbed completely to the fantasy. (AUDIO: Deadline)