One common theme is the struggle with identity. Since they are from different 'sides' in the original story, their relationship in the fanfiction often challenges their pre - existing identities. For example, Sesshomaru, who is usually seen as a cold and proud demon, has to re - evaluate himself when he falls in love with Inuyasha.
One great fanfiction could be 'The Unlikely Bond' where Sesshomaru gradually discovers his unexpected feelings for Inuyasha through a series of adventures. In this story, they are forced to work together against a common enemy and during that time, Sesshomaru's view of Inuyasha starts to change.
Well, 'The Unspoken Connection' is a great fanfiction in this regard. It shows how Inuyasha and Sesshomaru, despite their differences, have a sort of unspoken bond. It might start with a small incident, like when they are both after the same magical item. But as the story progresses, they realize that they are more alike than they thought. Then there's 'Unexpected Allies' where their alliance is born out of necessity at first, but then develops into something deeper. They learn to rely on each other and in the process, a unique relationship forms between them. And don't forget 'Hidden Feelings' which really plays on the idea of them having emotions for each other that they are hesitant to show.
You can try some well - known fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions across various fandoms, including Inuyasha. Just use the search function and type in relevant keywords like 'Inuyasha' and 'Sesshomaru' relationship. Another option is FanFiction.net. It also has a decent number of Inuyasha - related fanfictions. You might need to dig a bit deeper in the search results, but it's likely you'll find some good ones there.
In some fanfictions, Sesshomaru being Inuyasha's father can lead to really interesting plot developments. For example, it can create complex family dynamics. There might be stories where Sesshomaru has to come to terms with his new - found fatherhood and how it changes his relationship with Inuyasha, who he may have previously seen as an enemy or a rival. It also allows for exploring Inuyasha's feelings towards having a father figure like Sesshomaru, who is such a powerful and complex character in the Inuyasha universe.
Sesshomaru would raise the baby with a combination of discipline and protection. He would protect the baby from any threats, using his powerful abilities. At the same time, he would discipline the baby when it made mistakes, teaching it the ways of the demon world. Inuyasha, on the other hand, would add a more carefree and emotional touch to the parenting, creating a balance in the baby's upbringing.
In fanfiction, the baby could be the key to unlocking some long - lost secrets in the Inuyasha universe. Since Sesshomaru and Inuyasha have such complex histories and lineages, the baby might hold the answers to ancient prophecies. It could also have a special bond with the Jewel of Four Souls, perhaps having a unique way of controlling or protecting it that neither of its parents had. And of course, there would be all kinds of emotional drama as the two brothers - turned - co - parents deal with their new relationship.
The theme of coexistence is also quite prevalent. Given their different natures and goals, fanfictions explore how they can live in the same world. Some stories show them finding a balance between their demon and human sides, which is related to their individual identities. It's about how they can tolerate and even support each other in a world that doesn't always accept them for who they are.
A popular one is 'The Meeting of Paths'. This fanfiction focuses on a situation where Inuyasha and Sesshomaru meet under different circumstances than in the original series. It has great characterizations, and the way the two interact and gradually change their views of each other is really well - written.
Yes, there are likely fanfictions out there with such a plot. Fanfiction writers often explore different relationships and scenarios that might not be part of the original canon. They can create unique stories where Rin and Sesshomaru end up getting married, imagining how their relationship could develop over time and what kind of life they would lead together.