Dear diary,

Not many people know this, but I plan to keep it a secret for years and years. If it got out, it could ruin my life. It could ruin her life. Here I can write it. In this diary I can write my deepest darkest secrets.

My name is Hermione Jean Granger. My secret is deep. Here it is. I have a younger sister. A muggle sister. Her name is Ava Libre Granger. She went missing when I first joined hogwarts. They haven't found her since. I am the only person who knows where she is. The only way I know this is that she sent me a letter telling me. She trusts me with this secret and I plan to keep it.

I am in my 5th year now, and I am 15. She will be 13 right now. I am scared that this may get out, but as long as I am careful, it won't.

-Hermione Jean Granger.