[@Lunarlors34] I think Rosalina would be the type of person that would let him in, but he'd have to go through her etiquette 'boot camp' which I don't think Sora will respond well too. He doesn't seem like the type of person who would be comfortable with taking orders from someone who he deems weaker than him. Which Rosalina is, magically at least.

If he can't learn to get over his own ego and accept Rosalina as his superior then he'd have no place in the Knights. It's not about Rosalina wanting people to worship her, but a good soldier is a soldier who listens. Sora strikes me as the kind of person to question every order which would not fly with someone like Rosalina.