Serene Summer

We are not talking about genres, but about people.

People who cosplay a particular franchise from a specific genre. Often, they choose science fiction. The number of people who have cosplayed Edward Elric and L from Death Note is staggering, which, by the way, emphasizes individuality and unconventional thinking.
By the way, anime-style pictures are also related to this phrase. There are random, semi-pornographic drawings in an anime style, but most of them are fan art based on a specific franchise. There are also a lot of "unique" works there.