Well, 'owns' here might be a bit of a loose term. It could be that he has a strong connection to the Hermione fanfiction he's associated with. Maybe he manages a website or community dedicated to Hermione fanfiction, so in a sense, he 'owns' that part of the fanfiction world related to Hermione. He could be responsible for promoting it, curating it, and making decisions about what gets included or excluded in his domain of Hermione fanfiction.
It could mean that in the context of fanfiction, a character named Harry is in a situation where he has possession or some sort of control over Hermione - related fanfiction. Maybe he's the author or has somehow acquired a collection of such fanfictions in the fictional world of the fanfiction.
It could mean that in the context of fanfiction, Hermione has some sort of control or possession within the fan - created stories about Harry. Maybe she is a dominant character or has a special role in those fanfictions.
It could imply in the context of fanfiction that Hermione has some sort of ownership or a significant role related to Harry's collar. Maybe it's a unique or symbolic item in the fan - created story.
It could mean he has the rights to certain fan - created stories related to Harry Potter. Maybe he's a collector of unique fanfiction works, or perhaps he's in a position to manage or curate a collection of such writings.
Without more context, it's hard to say exactly who 'he' is. It could be any fan of the Harry Potter series who has a particular interest in Hermione and has created or taken on some form of ownership in relation to fanfiction about her.
Well, if he owns Harry Potter slash fanfiction, it might imply that he is in control of a certain body of work within the realm of fan - made stories about Harry Potter. Slash fanfiction is a specific type of fan - created content. He could be the author who wrote it and thus owns the intellectual property of his own creation. Or perhaps he has acquired the rights to distribute or manage this particular fanfiction from the original creator.
Well, 'Percy' could be a person's name. If he 'owns' Artemis fanfiction, it might mean he has created it, or perhaps he has the rights to it in some way, like he's the author or has obtained the rights legally. Maybe he's a big fan of Artemis and decided to write some fan - made stories about her.
Perhaps in a particular fanfiction universe, Harry has obtained the rights to Severus fanfiction. It could be that he's the one who has access to all the Severus - themed stories, like he's in charge of archiving or managing them. This might be part of a more complex fan - created plot where different characters interact with fan - made works in unusual ways.
It could mean that in a fan - created story, Naruto has some sort of ownership or special connection to Konoha. Maybe he has become the leader or has a unique role in controlling aspects of the village within the fanfiction world.
Another interpretation could be that Harry has some exclusive rights to a particular set of Snape fanfiction within a certain fan community. For example, he might have been the first to come up with a unique plotline about Snape in the fanfiction world, and thus it's considered that he 'owns' that concept or those stories in a sense.