Well, in some 'evil harry and fenrir mates fanfiction' plotlines, it could start with Harry being ostracized from the wizarding community for some reason and then finding solace in Fenrir's company. They could then plot revenge against those who wronged Harry. Or perhaps they are brought together by a dark prophecy that only they can fulfill, which involves a lot of dark magic and battles against the forces of good in the wizarding world. This would involve complex character development as Harry turns further towards the 'evil' side and Fenrir's role in guiding or influencing him.
One possible plotline could be that Harry, in his 'evil' form, forms an alliance with Fenrir. They might decide to take over the wizarding world together, using Fenrir's werewolf strength and Harry's knowledge of magic. Another could be that they are on a quest to find a powerful magical artifact that can change the fate of the werewolves in the wizarding world.
I'm not sure of specific 'evil harry and fenrir mates fanfiction' off - hand. But you can try searching on fanfiction - dedicated websites like Archive of Our Own. There are likely to be many creative takes on this rather unique pairing in the Harry Potter fanfiction universe.
Well, perhaps Harry would be more isolated in this fanfiction. Since Greyback is a feared werewolf, other magical beings might avoid Harry. This could lead to him developing a very self - reliant nature. He might also have a different view on magic. Instead of using it for good in the traditional sense, he could use it more for survival and protection, which would put him at odds with some of the more morally upright characters in the Potterverse.
Well, a plotline might involve Harry, already having a rough time in the wizarding world, being lured into Fenrir's clutches. Fenrir, seeing the potential in Harry, decides to make him his submissive mate. As the story progresses, Harry could struggle with his new role, trying to resist at first but then gradually succumbing due to some form of psychological or magical influence. Meanwhile, the wizarding world might be in chaos as they try to figure out what has happened to Harry and how to deal with Fenrir's new power play. There could also be other characters from the original series who try to rescue Harry, leading to a series of intense confrontations.
A possible plotline could be that Charlie has been secretly in love with Harry for years, but has been too shy to admit it. One day, while Harry is on a mission near the dragon sanctuary where Charlie works, they are forced to work together closely. Their soul - mate bond becomes more evident during this time, and they finally confess their feelings.
One possible plotline could be them facing a common enemy that threatens both their worlds. They'd have to combine their skills to defeat it.
Well, one possible plotline could be that Naruto meets Grandeey in a strange new land. They start off as strangers but gradually learn about each other's powers and abilities. As they face various challenges together, they develop a bond that turns into a romantic relationship. Another plotline could be that Grandeey is in trouble and Naruto, being the hero he is, comes to her rescue and in the process, they fall in love.
Another plot could be that they are on opposite sides of a conflict initially. But as they realize they are mates, they have to find a way to reconcile their differences and work together. This could involve a lot of internal struggle for both of them as they deal with loyalty to their respective sides and their new - found bond.
One possible plotline could be that Harry discovers a dark secret about his family and feels betrayed by the wizarding world. This could lead him to side with the dark forces. Another could be that he is influenced by a powerful dark wizard who manipulates his mind. Maybe he becomes envious of the power others hold and decides to take it by any means, turning evil in the process.
One possible plotline could be that Fenrir takes Hermione as a hostage to use against the Order of the Phoenix. He might think that her connection to Harry Potter makes her a valuable bargaining chip. Another could be that he is under the control of a dark wizard who orders him to capture Hermione for some dark magic ritual. In some fanfictions, it could also be that Fenrir has some sort of personal vendetta against Hermione and takes her to exact revenge for something she did to him or his kind in the wizarding war.
Well, perhaps in the fanfiction, Fenrir Greyback is under the command of Voldemort to watch Hermione as she is seen as a threat to the Dark Lord's plans. He might follow her around Hogwarts, observing her every move. This could lead to some tense moments where Hermione senses she's being watched but can't quite figure out who it is at first. As the story progresses, she could start to set traps to catch her stalker, which would be Greyback. And there could be a big showdown between them in the end.