There could be a young, ambitious knight who has seen the injustices in the Seven Kingdoms and becomes a key figure in the uprising. Another might be an old and wise maester who secretly supports the uprising and uses his knowledge to help the rebels. Also, a strong - willed noblewoman who has her own reasons for wanting change could be one of the main characters.
Twilight is not a fanfic. It was developed independently by Meyer and became a highly popular series. The story, characters, and plot are all original creations of the author.
Twilight was not derived from a fanfic. The story was created independently by Stephenie Meyer, and it gained popularity on its own merit. There's no connection to any pre-existing fan-written works.
Definitely not. Twilight has nothing to do with MCR. It emerged as a separate fictional creation that gained popularity on its own merits rather than being related to MCR in any way.
Twilight and 50 Shades have no direct connection. Twilight is a popular vampire-themed series, while 50 Shades is a romance with a different focus. So, Twilight is not a fanfic of 50 Shades.