Another theme is the discovery of self - worth for the oc. Through their relationship with Sesshomaru, they not only find love but also come to understand their own power and importance. For example, in some fanfictions, the oc realizes they have latent powers that are awakened because of their bond with Sesshomaru.
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.
One common theme is the overcoming of differences. Sesshomaru is a demon and Kagome is a human, so there's often a story about how they bridge that gap. Another theme can be the protection aspect, with Sesshomaru protecting Kagome from various threats.
The theme of redemption can be found in many 'sesshomaru x kagome mate fanfiction'. Sesshomaru may have a dark past or actions that he needs to atone for, and Kagome's love and influence help him on that path. Another theme is the exploration of new powers. Their union may unlock new abilities for either or both of them. And of course, the theme of acceptance, as they have to accept each other completely, flaws and all, in order to have a successful relationship.
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.
Love and redemption are also prevalent themes. Sesshomaru may be seen as a cold and aloof character at first, but through his relationship with the si oc, he may experience a change of heart. The si oc might also find redemption in their own way, perhaps by helping Sesshomaru or the people in the Inuyasha world. This theme adds a lot of depth to the stories.
One great story could be 'A Bond Beyond Worlds' where the OC has a unique power that attracts Sesshomaru. Their relationship develops as they face common enemies together. The story is well - written with vivid descriptions of their interactions.
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.
Power dynamics is another theme. Caius has a certain power, and the OC may or may not have their own powers. The fanfictions explore how these power levels interact and how they influence the relationship, whether it's through protection or a power struggle.
The theme of sacrifice also appears frequently. Maybe one has to sacrifice something for the other's well - being or for the greater good in the story. And of course, the theme of discovery, as they discover new things about each other, their powers, or their pasts as the story progresses.
One common theme is the journey of self - discovery for Sesshomaru. The OC's pregnancy forces him to look at himself and his place in the world in a new light. Another theme is the protection of the unborn child. Sesshomaru, being a powerful character, will go to great lengths to keep the OC and the baby safe.