What does the work tell us about how people behave?- Mortal Instruments

In my book it is a fantasy book. So they usually have special abilities which make them stronger. In my book Clary has special abilities which make her smarter, and stronger. Also since in fantasy books, there is usually a villain, they all go and try to fight the villain. This makes every single character stronger! They usually behave very heroic and out-going. The villain acts very evil, and controlling. Even though this is how the characters behave in my book, it is how most characters behave in a lot of books.