For other uses, see Imaginary friend (disambiguation).

Imaginary friends and imaginary companions are a psychological and social phenomenon where a friendship or other interpersonal relationship takes place in the imagination rather than external physical reality. Imaginary friends are fictional characters created for improvisational role-playing. They often have elaborate personalities and behaviors. They may seem real to their creators, though they are ultimately unreal, as shown by studies.[1]

Imaginary friends are made often in childhood, sometimes in adolescence, and rarely in adulthood. They often function as tutelaries when played with by a child. They reveal, according to several theories of psychology, a child's anxieties, fears, goals and perceptions of the world through that child's conversations. They are, according to some children, physically indistinguishable from real people, while others say they see their imaginary friends only in their heads. There's even a third category of imaginary friend recognition: when the child doesn't see the imaginary friend at all, but can only feel his/her presence.