Is this not real or should you say not on planet earth Chloe C Hosterman is not real?

Chloe C. Hosterman is a fictional character created by the actress and singer Olivia Rodrigo, who uses her as a persona in her artistic work. Therefore, she is not a real person in the sense of existing independently in the world. The phrase "not on planet Earth" could be a creative way to emphasize her fictional nature, but it might also imply that she exists in a different realm of imagination or storytelling.