I'm guessing it has to do with Renka, the singing voice of Azura (or Aqua). She did release a single of the main theme and all so I'm sure that's copyrighted.
Also, question..When did DLC release for Fire Emblem If in Japan? If it was released later after the games' release, then it's unintentional Day One DLC for the rest of the world because all they need to do is translate. I know Revelation was released a week or two after the two versions were released in Japan so...







