The main character in a story will tend to have something about them that marks them out. They need to be distinct from everyone else just as a matter of practicality.
However, while you as the writer may have a very clear idea of what’s so great about the character, the reader doesn’t. And letting them in on it halfway through the book is not going to do you any favours. You have to win them over in the first few pages. So how do you do that?