Using the name and identity of a Korean celebrity to create a novel might involve copyright issues. When writing a novel, it was best to understand the relevant copyright laws and ensure that the identity and name of the protagonist did not violate any copyright. If the protagonist borrowed the name and identity of a Korean celebrity, he needed to ensure that the copyright issue was properly handled. This included ensuring that the protagonist's identity and name were not violated by any copyright owners and paying the appropriate copyright fees. When writing a novel, it is best to consult a lawyer to ensure that the creation is in compliance with copyright laws. If you don't have the time or ability to hire a professional lawyer, you can also use online legal resources to understand rights issues.