Imaginary friend

According to Jeanne-Antoinette Poisson, it was customary to have an imaginary friend only during one's childhood. She likened the Tenth Doctor to an imaginary friend. (TV: The Girl in the Fireplace)

The First Doctor had an imaginary friend called Binker. (AUDIO: The Abandoned)

Growing up after meeting him, (TV: The Eleventh Hour, Let's Kill Hitler) Amy Pond knew the Eleventh Doctor as her imaginary friend. (TV: The Beast Below, The Big Bang)

Rory Williams had an imaginary friend called the Chiropractor. (PROSE: Stop, Thief!)

Mels Zucker had an imaginary friend who told her to kill people. (PROSE: Stop, Thief!)

Sandy was Annabel Price's imaginary friend. It came to life. Chris Cwej noted that, for an imaginary friend, it was "not that imaginary... or friendly". (AUDIO: The Dread of Night)

Nardole claimed to have had an imaginary friend, until he left him for someone else. (TV: The Lie of the Land)