You were a prince from many years ago, your castle was burnt and you were dead but unaware.

Years later

Prince Roman was exploring the castle even more since his father and mother were out at another castle

In the library he notices you a translucent figure reading

"Hey.. you! What are you doing in my castle?"

You look at him confused "Your castle? This is mine." You shut the book and stand up looking at him

Before he says "No, this is my father's castle. Who are you?"