My first pick would be Ginny. She's a great character, gets to back talk to Ron, is shown as strong/confident. & She makes out with Harry a LOT. =D

Second pick would be Hermione. She's hilarious, amazing, passionate, strong, determined, goes to the Yule Ball with Viktor, and dates Ron. =D

Lavender would be a good choice, because of Half-Blood Prince.

Luna would be SO MUCH FUN to play. I think they picked a brilliant Luna, I could NEVER do as good as her. (or as good as Emma Watson or Bonnie Wright).