the princess is a unique NPC found in The Smoke and Pipe. You can try talking to her but she ignores you. Silvia appears to possess the same... special skills as a prostitute. Namely, she can sleep with other NPCs for money. She was added sometime during the Elona beta versions along with the South Tyris continent. When killed, she drops many tomatoes, some of them rotten, along with her card and statue. She is a character from the Japanese novel series, The Guin Saga.