The Secret Symphony (OC/Bowser)

This is basically going to be my practice book lol. This is based off of a prompt I found on Poe AI, and I decided to incorporate it into a book because it interested me. Please keep in mind I've not written for nearly a year and a half, and I barely practiced before that. The book should improve as I write, and I may go back and edit the more crappy chapters as I improve. That being said, here's the actual description.

This is an OC x Bowser.

The kingdom's name is Celestia, and the inhabitants are called Aerialites. More info on this will be put on the info page.
The kingdom was founded centuries ago by a powerful wizard who used his magic to build the massive floating islands on which the kingdom now stands.
The wizard chose the most skilled and talented craftspeople from all over the world to live and work in the kingdom, and they helped him create the spectacular architecture and advanced technology that make the kingdom so unique.
The kingdom is a place of peace and prosperity, where the inhabitants live lives of luxury and comfort. They have everything they need and are free from the troubles of the outside world.
Despite its secrecy, word has come to Bowser's ears that a powerful kingdom lies hidden in the clouds, and he's determined to find and conquer it.
The current princess of the kingdom is a skilled fighter. She is determined to defend her kingdom from any and all enemies, and she has the skills and resources to do so.