Disclaimer: I do not own the characters or their world. Anything that Rowling didn't create is just a figment of my twisted imagination.
Warning: Contains hints of femslash
Pansy loved Luna's hair. "It's soft, and smooth, and the most perfect brown-gold," she would say. Luna smiled. It was the sweetest thing Pansy ever said, and it felt wonderful when Pansy stroked her head. Like a pet, but Luna didn't really mind. She couldn't be friends with people, she was too different, but she could be a nice pet. After all, weren't pets supposed to be cute and amusing? Luna could do that.
Pansy smiled. At first glance, it was a warm, bright, glowing smile, the sort one would expect from a happy child. But Luna knew better. When she looked closer, that smile was a threat, all sharp edges and hidden steel, like Pansy herself. That was the smile that had Pansy's heart in it – lust was there, cruelty was in there, but love and even affection were in short supply.
Though people always complained that Pansy was pug-faced and ugly, Luna didn't really mind. After all, if you're a virginal, bookish Ravenclaw, anyone looks attractive with their tongue down your throat. It wasn't like Luna herself was much of a prize, either, with overlarge pale eyes in a plain face, and her odd taste in clothes.
"Nobody ever needs to know," Pansy said, and she was right. People noticed if a boy and a girl, or even a boy and a boy snuck off together, and suspected, but a pair of girls? Female friends snuck off to talk and giggle alone all the time, and if they came back with flushed faces, they must have been talking about boys. And they could hug, or hold hands, or whisper in each others' ears. Things lovers would do, but things a girl and her friend would do, too.
At the end of Luna's fifth year, Pansy said goodbye. The school was closing, the war beginning, and Pansy had to go join her Dark Lord, the Lord "Flight of Death", as his ostentatious name told. Lips pressed briefly against Luna's, and Pansy patted her on the head. "Stay safe, little Loony. I may need company once I've married a man." No one knew why Luna stood there, grey-blue eyes turned down at the corners, staring down the empty corridor. No one would ever know.