Who was Charles in the kid cudi songs?

In Kid Cudi's songs, Charles often refers to a character or persona that embodies Cudi's introspective and emotional struggles. Specifically, in tracks like "The Prayer" and "Mr. Rager," Charles represents a part of Cudi's inner conflict and journey through mental health challenges. This character serves as a way for Cudi to explore themes of vulnerability, identity, and personal growth throughout his music.