In the story/short film "Who Am I This Time" by Kurt Vonnegut, one of the main characters is named Harry. Harry is known around town as the shy guy. He does not do anything besides act and work. Right after he is done with either work or performing, he quickly goes home. His social life is also nonexistent. The only identity Harry has is the one described for him in the playbooks. Acting is, quite literally, his life. Only through acting can Harry relate to others. It gives him confidence, and in this story, leads to romance.
The only identity Harry has is the one described for him in the playbooks. This is stating that people only know Harry as an Actor and not as a person. No one knows what Harry likes to do outside