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.
One popular type might be the Sesshomaru and Naruto crossover. In these, Sesshomaru could end up in the Naruto universe, perhaps clashing with powerful ninjas. Another could be a crossover with Harry Potter, where Sesshomaru's demon powers would be quite a contrast to the magic in the wizarding world. There are also crossovers with characters from other anime like One Piece, where the interactions between Sesshomaru and the Straw Hat crew could lead to some really interesting and action - packed scenarios.
Their relationship could develop through shared adventures. For example, if they are in a world filled with puzzles and traps, Sesshomaru's strength and Rin's quick thinking could complement each other. As they overcome these challenges, they grow closer. Sesshomaru might start to show more vulnerability around Rin, and Rin would become more confident with Sesshomaru's protection.
Sesshomaru's speed and agility would be a great asset in Middle - earth. He could easily outrun orcs and other foes. His sword, Tenseiga, which has the power to resurrect, could also have an interesting impact. For example, if he were to use it on a fallen hero, it could change the course of a battle.
Another option is Wattpad. Although it's not as specialized in anime - related fanfictions as the other two, you can still find some interesting 'Inuyasha' and 'Sesshomaru' crossover stories there. Some of the stories on Wattpad have a more modern take on the characters, which can be quite refreshing.
First, understand Sesshomaru's character well. Know his personality traits like his pride, his cold - heartedness yet also his sense of honor. Then, when choosing the other crossover element, find a good connection point. For example, if it's a crossover with a modern - day setting, think about how Sesshomaru would react to modern technology. Keep the plot engaging by having a clear goal or conflict, like Sesshomaru having to defeat a new enemy that combines the threats from both his world and the crossover world.
A great plot could be a crossover where Sesshomaru and Rin end up in a magical realm that is a mix of their two worlds. Here, they meet new characters who mistake them for powerful beings from their own lore. They have to work together to find a way back home while also dealing with the power struggles in this new realm. Or perhaps a plot where Rin gains some of Sesshomaru's powers accidentally and Sesshomaru has to train her to control them, which leads to a deeper bond between them as they face challenges from other demons who are envious of Rin's newfound powers.
One idea could be Sesshomaru arriving in Middle - earth in search of a powerful relic. He might cross paths with Aragorn and initially be seen as a threat. Another could be that he forms an alliance with the elves, as they both have an air of elegance and long - lived existence. Maybe he gets involved in the battle against Sauron, using his demonic powers in a way that surprises both friend and foe.
First, look for a well - written Sesshomaru. He should be in - character, not just a shell of his original self. The world - building of the crossover is crucial too. For instance, if it's a crossover with a different anime, how the two worlds blend together seamlessly. Another aspect is the relationships. How Sesshomaru interacts with the new characters from the other universe, whether it's a friendship, an alliance or a rivalry.
One popular sesshomaru crossover fanfic is 'Sesshomaru in the Modern World'. It's an interesting take where Sesshomaru finds himself in a contemporary setting and has to adapt. There are also some great crossovers with other anime like 'Sesshomaru and Naruto: The Unlikely Alliance' which combines the two different universes in a really cool way.