[Luna Lovegood]

People bitch about how Vaan and Penelo shouldn't have been in the game, but it would probably have been a bit crap without them in all honesty. Sure they may not have been integral to the story past the first few hours of gameplay, but they both did their bit to progress the game as it went on, and in a way they couldn't have done with the rest of the characters, so really they're not so bad, they just don't take a truly active role in the story as a whole, like permanent guests in your party