I like the simplicity of Aiko's Theme, as well as the through line of the music box coming back to help tie the songs together! I love the unnerving feel of The Depths as well. I overall like your ideas, but wish there was a little bit more of a rich instrumentation to help really sell your ideas even more, for example: I really like the orchestral elements in Child of Love, and given the triumphant nature of the song including some more of the orchestra to help make the cool harmonies you have sound even more rich. I think you are absolutely on the right track with this and should be proud!!