Ginny with Riddle's Diary

'How did Ginny get like this?'
'Well, that's an interesting question and quite a long story. I suppose the real reason Ginny Wealsey's like this is because she opened her heart and spilled all her secrets to an invisible stranger.'
'What are you talking about?' said Harry.
'The diary,' said Riddle. 'My diary. Little Ginny's been writing in it for months and months, telling me all her pitiful worries and woes. It's very boring, having to listen to the silly little troubles of an eleven-year-old girl, But I was patient. I wrote back, I was sympathetic, I was kind. Ginny simply love me. If I say it myself, Harry, I've always been able to charm the people I  needed. So Ginny poured out her soul to me, and her soul happened to be exactly what I wanted. I grew stronger and stronger on a diet of her deepest fears, her darkest secrets. I grew powerful, far more powerful than little Miss Weasley. Powerful enough to start feeding Miss Weasley a few of my secrets, to start pouring a little of my soul back into her...'
'What d'you mean?'
'Haven't you guessed yet, Harry Potter? Ginnny Weasley opened the Chamber of Secrets. She strangled the school roosters and daubed threatening messages on the walls. She set the serpent of Slytherin on four Mudbloods, and the Squib's cat. Of course, she didn't know what she was doing at first. It was very amusing. It took a very long time for stupid little Ginny to stop trusting her diary. But she finally became suspicious and tried to dispose of it. And that's where you came in, Harry. You found it, and I couldn't have been more delighted. Of all the people who could have picked it up, it was you, the very person I was most anxious to meet. Well, you see, Ginny told me all about you, Harry. I knew I must find out more about you, talk to you, meet you if I could.
'Imagine how angry I was when the next time my diary was opened, it was Ginny who was writing to me, not you. She saw you with the diary, you see, and panicked. What if you found out how to work it, and I repeated all her secrets to you? What if, even worse, I told you who'd been strangling roosters? But I knew what I must do. It was clear to me that you were on the trail of Slytherin's heir. From everything Ginny had told me about you, I knew you would go to any lengths to solve the mystery - particularly if one of your best friends was attacked. And Ginny had told me the whole school was buzzing because you could speak Parseltongue...
'She put too much into the diary, into me. Enough to let me leave its pages at last.'

THE HEIR OF SLYTHERINE - Pg 328