To figure out what kind of noun "she" replaces, you need more context. For example:
* "She is a doctor." Here, "she" replaces the noun "doctor" (a common noun).
* "She is my sister." Here, "she" replaces the noun "sister" (a common noun).
* "She is the Queen." Here, "she" replaces the noun "Queen" (a proper noun).
Let me know the sentence, and I can tell you what kind of noun "she" is replacing.