The main characters are Harry and Sesshomaru. But we can't forget about Dumbledore, who might play a role in Harry's journey to Sesshomaru's world. Maybe he has some knowledge about this strange connection and gives Harry advice before he goes. On Sesshomaru's side, his half - brother Inuyasha could also be involved. He might be suspicious or even hostile towards Harry at first, but then come to accept the relationship as he sees how it changes Sesshomaru for the better.
Well, it could involve a world where magic from Harry's realm and the demon world of Sesshomaru collide. Maybe Harry gets transported to Sesshomaru's world and they initially have a lot of misunderstandings due to their different natures. But as time goes on, they start to see the good in each other and form a bond that goes beyond their different origins.
A third plotline could center around the challenges they face as a couple. There could be opposition from both their respective worlds. In Harry's world, the wizarding community might not understand her relationship with a non - human from another realm. In Sesshomaru's world, demons might have their own opinions about a human - like Harry being his mate. This could lead to many conflicts and a journey of them trying to be together despite all the odds.
Perhaps Harry Potter gets transported to Sesshomaru's realm. Harry, being lost in this new and dangerous place, catches Sesshomaru's attention. Sesshomaru, out of curiosity at first, decides to keep an eye on Harry. As time passes, he discovers Harry's unique magical abilities and his kind heart. Harry, on the other hand, is in awe of Sesshomaru's power and his otherworldly beauty. Their relationship could start from a simple acquaintance to a deep, meaningful bond as they face different trials and tribulations in Sesshomaru's world.
Harry would probably be cautious at first. He's used to dealing with humans and wizards, not demons like Sesshomaru. Sesshomaru, being a proud demon, might seem aloof. But Harry's intelligence and magical skills could pique Sesshomaru's interest. Harry might try to use his magic to understand Sesshomaru better, like using spells to translate Sesshomaru's language if there is a communication barrier.
Sorry, I can't directly recommend specific 'fem harry is sesshomaru's mate fanfiction' as there are so many fan - made works out there. You can try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net.
One common theme is the struggle of an ordinary oc becoming worthy of a powerful being like Sesshomaru. It often involves the oc having to prove themselves, either through strength or some other special quality.
Love against all odds is also a frequent theme. Given their initial enmity or indifference towards each other, seeing them fall in love and become mates is a central aspect. Their relationship often has to overcome obstacles like other suitors, family expectations (in sesshomaru's case, perhaps his clan's view), and their own personal biases.
I really liked 'The Moonlit Mate'. In this fanfiction, the OC is a powerful healer who catches Sesshomaru's attention. The story is filled with adventure as they face various challenges together. It also delves deep into Sesshomaru's character, showing how he gradually opens up to the OC. And there's 'Destined Encounter' where the OC has a mysterious past which ties in with Sesshomaru's own journey. The writing is engaging and the relationship between the two characters feels very natural.
The world - building around them. If the fanfiction expands on the Inuyasha universe, adding new locations or lore related to Sesshomaru's world, it enhances the overall experience. For example, if the OC comes from a hidden village with its own set of rules and magic, and this village becomes part of the story's plot as Sesshomaru and the OC's relationship evolves, it makes the story more complex and interesting.