Well, this claim is going to be much less rage inducing.
I claim Nara, also known as Minea or Meena from Dragon Quest IV
When dealing with twins, it's customary to take them both. However, only Nara interests me since her sister Maya comes off as the kind of skank ho I'm never interested in. Beautiful, but modest and very mature, Nara is pretty much an avatar for the kind of woman I wish I could go out with in real life.
Not to mention her healing would compliment Sona and her fortune telling wotu compliment Natsume very well. And you can never go wrong with beautiful brown skin! :P