Ginny! Ginny likes Fred best.

 

"Come ON!" Ginny whines, and she's six years old and adorable, so Fred smooches her on the cheek and says,

"Okay, gimme the crown, I'll be the princess this time," and Ginny looks at him adoringly and straps the fake sword -- two branches tied together -- to her frock. It's so big it almost drags on the ground behind her, and Ron complains bitterly when she can't quite keep up on her brother's broom, but when Ginny waves the sticks around in George's face, who's roaring and has Fred on his back, she's as determined as any of her brothers.

And she saves Fred from the evil dragon, too, which earns her another kiss from the princess, and her face is all glowing. "I did it!" Ginny yells, running into the house with leaves in her hair. "Mummy, I did it! I killed the dragon!"

Outside, George and Ron are laughing in the grass. Fred's staring in the open kitchen door.