“The Heart is a Lonely Hunter” by Carson McCullers: Protagonist says she has a hundred hidden parts and pieces (dissociative identity)
“She [“Mick”] had always kept things to herself. That was one sure truth…
“She put her head on her knees and tied knots in the strings of her tennis shoes. What would Portia say if she knew that always there had been one person after another? And every time it was like some part of her would bust in a hundred pieces.
“But she had always kept it to herself and no person had ever known” (1, p. 62).
Comment: Above implies hidden dissociative identity (a.k.a. multiple personality) of the protagonist and that the author may have had a creative version. Dissociative identity is usually hidden until diagnosed.
1. Carson McCullers. The Heart is a Lonely Hunter. New York, The Modern Library, 1940/1993.