Disclaimer: Not mine, of course!
Luna lay on the damp grass, looking up at the bright, cloudy sky. The clouds made sense to her. They were pure and free. They could look however they chose. Her favourite that particular afternoon was a small cloud, which looked just like a nargle.
One thing she noticed about the clouds was that they went in pairs. It was strange, she thought, how something so seemingly inanimate could be so beautiful, and could choose not to be alone. Luna thought she might quite like to be a cloud.
She was always one of a kind. Just Luna, or sometimes Looney Lovegood. That didn't really bother her, that people thought she was mad, or weird. Maybe she was. She didn't think so. She just smiled at them, and played with her butterbeer cork necklace. People questioned the sorting hat when they found out she was in Ravenclaw. She didn't mind that, either. Ravenclaw was a house of Intelligence, indeed, but Luna knew that not all intelligence came from books. Luna's unique intelligence came from understanding and belief.
No. What bothered Luna was that she was never the most important person, not to anyone. She had a lot of friends, oh yes. She had a lot of friends now. Ginny, Neville, Harry, Ron and Hermione were her friends. Cho Chang and Marietta Edgecombe smiled at her and said good morning. She appreciated that. Even Lavender, and Dean and the some other Gryffindor's and Ravenclaw's spoke to her occasionally.
Luna was appreciative of her friends. She hoped they knew that. No, what bothered Luna was that she was still on her own. She knew Harry, Ron and Hermione were together first and foremost. She knew Ginny and Neville were closer friends than she could be with them. She knew Cho and Marietta were just being polite. She knew Lavender and Pavarti, and Dean and Seamus were best friends. She knew she was on her own.
Luna looked at the clouds floating by, one in the peculiar, but comfortingly familiar shape of a radish, closely followed by what looked suspiciously like a rat. Luna didn't laugh at the oddness of the couple. A radish and a rat. Nothing made more sense than that.
The radish and the rat had chosen each other, just like she hoped that one day, someone would choose her. Yes, Luna thought, it might be quite nice to be someone's first choice.