The antagonist can also be a popular character. Their motives and the mystery surrounding them can draw readers in. In 'the hurricane wars fanfic', if the antagonist has a complex backstory that drives their actions, it can make them very interesting.
The main protagonist is usually quite popular as they are often at the center of the action. Their determination and unique abilities make them stand out.
Sometimes, the mentor - like characters are popular too. They provide wisdom and guidance to the main character. In this fanfic, if there is a mentor who has survived many battles in the hurricane wars, their experiences and knowledge can be really appealing to the readers.