What she really means:
In DDD of The Symphony of Sorcery world Sora and Riku had to get song pieces to help wake up Mickey. The song was Dearly Beloved. Riku had the melody while Sora had the harmony. The harmony usually completes the melody so does that mean that Sora completes Riku? Also the scene where they are discussing how to wake up Sora, Dearly Beloved starts playing again when Riku talks about Sora on how he's a dork and that it's his job to take care of him and he heard Sora call out his name. So does this mean that Dearly Beloved is the SoRiku theme song in the KH series????