A man's lifelong hold on an imaginary person.
"He could never really explain it, once he got past that age where it stopped being okay to have an imaginary friend. He always knew she wasn't an imaginary friend. But he desperately tried to explain it anyway, to all the school counselors and all sorts of in-network therapists as he got older. It was simple in some senses. She was supposed to be living on his street. She was supposed to be in his kindergarten class. But all the houses were full with other families. And every little spot on that circular alphabet rug in his classroom was taken by someone else. Leona never happened."