I am writing a story set in a medieval fantasy world. Can you provide me with a brief background for a knight named Sir Cedric, who is known for his bravery and honor but carries a dark secret? Your response should contain at least 3 paragraphs. Paragraphs are separated with the markdown divider: ***. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. At the end of your response, please explicitly add a postscript starting with P.S.

user