^hmmm I don't listen to very many Nana ballads to be honest... she should really have more epic ones though because she sings them wonderfully!
Other than the ones you've mentioned,
hmm Trinity Cross (is that a ballad lol).
Tears' Night is a good one
Sing Forever
Hime Murasaki (though again not sure if that counts as a ballad)
Naked Feels
Hitotsu dake chikaeru nara
Hoshizora to tsuki to hanabi no shita (this one's very nice)
Stand
My Live DxF poster keeps falling off my wall
