This is a theory I literally just thought of. Lets all move back to KH1, when Sora released the hearts he had from within him. He had Kairi's and Ventus' heart, and the results were Roxas and Namine. Namine was created under odd conditions, since Kairi's heart was incorruptible, because it was a heart of pure light. But Ventus' heart was a heart of pure light as well, so wouldn't something similar to Namine have been created? Just something to think about.
This is a theory I literally just thought of. Lets all move back to KH1, when Sora released the hearts he had from within him. He had Kairi's and Ventus' heart, and the results were Roxas and Namine. Namine was created under odd conditions, since Kairi's heart was incorruptible, because it was a heart of pure light. But Ventus' heart was a heart of pure light as well, so wouldn't something similar to Namine have been created? Just something to think about.