One as an independent consciousness, while the other as an independent object. When it is necessary to describe the language or psychology of the protagonist, the term "zero" must be used, and when it is purely an object, such as "Ai Xue picked up the moon timepiece", a completely third-person description will use the term "moon timepiece". In fact, the reason why Ai Xue gave the protagonist two names is also because of such a consideration.