AI companies are under pressure from copyright disputes. OpenAI and Microsoft have been sued by The New York Times for infringement. Researchers are attempting to develop a "forgetting spell" to remove specific training data from models. They are using texts, including "Harry Potter," to test this forgetting spell. "Harry Potter," with its rich language and plot, is also popular among AI researchers and appears in some theories of AI ideologies. "Harry Potter" may contribute to the future development of AI models.