Perhaps it is because cats do not live by human patterns do not fit themselves into prescribed behavior that they are so united to creative people.
As for courage and will - we cannot measure how much of each lies within us...
I was in three academic clubs a huge book worm and the teacher's pet. I was...
Sometimes a character is really based on research that you do. Other times it's just based on your imagination or perhaps your conversation with the director. Or sometimes all of the above. It depends on the movie and character.