Inspo

Lars and the Real Girl

In this movie directed by Craig Gillespie in 2007. The main character, Lars, is extremely shy. His weird way to interact with people due to the schizoid personality disorder that he has makes it difficult for him to be able to socialize and form relationships. When he finally brings a girl to his small town, his brother and his sister-in-law, Gus and Karin, are the firsts to know. The only problem is that the girl is no real, is a sex doll, but Lars is the girl of his dreams. As soon as Karin and Gus meet Bianca, Lars' dream girl sex doll, they get worried about his mental health. They proceed to go along with the idea that she's real and eventually the whole town does too. 

I took this movie as an inspiration to see the way Gillespie interprets the idea of someone that's not real but the narrative world, the main character does, and see how the people around them react according to the surroundings where the character lives 

Fight Club

"A nameless first-person narrator (Edward Norton) attends support groups in an attempt to subdue his emotional state and relieve his insomniac state. When he meets Marla (Helena Bonham Carter), another fake attendee of support groups, his life seems to become a little more bearable. However, when he associates himself with Tyler (Brad Pitt) he is dragged into an underground fight club and soap making scheme. Together the two men spiral out of control and engage in competitive rivalry for love and power. When the narrator is exposed to the hidden agenda of Tyler's fight club, he must accept the awful truth that Tyler may not be who he says he is." - IMDb 

Jojo Rabbit

In this satire, the story revolves around Jojo, a German boy who dreams to be a Nazi. He is presented with a "problem" that turns his world upside down, he discovers that his mom is hiding a Jewish girl in their attic. Jojo and his imaginary friend, which is Hitler, Jojo confronts his nationalism along with Hitler. 

The idea of the imaginary friend for Jojo is more of a support system for him, he goes to Hitler to ask him for ideas and opinions. Jojo is conscious (I wanna say) of his imaginary friend not being real.