I think the obvious main character in AMARANTHINE is Astral. The book revolves around her. It follows her. She's in almost every scene. But, sometimes I think the main character is actually, Davn. Just like in Frankenstein by Mary Shelley the main character isn't actually the main character. Dr. Frankenstein is the title character, he's followed from beginning to end, he's in the book far more than his monster, however, the Dr. isn't really the main character. The book is structured to tell the tale of how the monster came to be. How he was shaped, how he was made, why he ended up the way he did, and why he did the things he did. The Dr. is the mirror that reflects the story of the monster, and so is Astral. But at the same time she is the actual main character. The story is her story. But in telling her story I have to tell Davn's as well. Is it possible to have two main characters? It's very circular.
On a positive note, if I've told both sides of the story in the same book I won't ever have to re-write it from Davn's POV. Which, I'm sure I've mentioned before, is a shameless cash grab, and a cheap trick to write two books without having two ideas.