Many young Rin and Sesshomaru fanfictions explore the theme of discovery. Rin discovers more about the world of demons through Sesshomaru, and Sesshomaru discovers emotions he didn't know he had because of Rin. There's also the theme of acceptance. Sesshomaru has to accept the fact that he cares for a human, Rin, and Rin has to accept the dangerous world she's in with Sesshomaru. These themes add depth to the fanfictions about them.
The theme of protection is very common. Sesshomaru is a powerful demon, and he often protects Rin from various threats in the fanfictions. Another common theme is growth, both in terms of Rin's physical and emotional growth as she spends time with Sesshomaru, and also Sesshomaru's growth in terms of his ability to care for someone else.
Protection is also a big theme. Sesshomaru feels a strong need to protect Rin, which is often explored in different ways in the fanfiction, like facing powerful enemies to keep her safe. Another theme is the exploration of an unlikely love. Their relationship defies the norms as Sesshomaru is a powerful demon and Rin is a human girl, and fanfictions like to dig into how such a relationship might work and develop over time.
One common theme is the exploration of family life. Since Sesshomaru is a demon and Rin is a human, their family dynamics can be really interesting to write about. Another theme could be the protection of their relationship from outside forces, like other demons or humans who might not approve.
Protection is also a big theme. Sesshomaru is a powerful demon, and in these fanfictions, he often uses his strength to protect Rin and their baby from various threats. Love is another common theme. The love between Sesshomaru and Rin is extended to their baby, and the story might show how this love shapes the baby's life.
One common theme is growth. Rin's growth from a child to a young woman and how that affects her relationship with Sesshomaru. Another theme is protection. Sesshomaru's role in protecting Rin is often a central focus.
One common theme could be the exploration of Sesshomaru's character development. How he, who was once a cold and aloof demon, would adapt to the idea of becoming a father. Another theme might be the changes in Rin's relationship with Sesshomaru and the others around them. For example, how would the other characters in their world react to this new development.
A frequent theme is the transformation of their relationship. In the original series, it was more of a guardian - ward relationship. In fanfiction about their marriage, it transforms into a romantic and equal partnership. Also, the idea of Rin growing up and becoming a strong character who can stand beside Sesshomaru is a common theme. It shows how she matures and how their relationship evolves over time.
One common theme is the relationship between Sesshomaru and Rin. It could be about how Sesshomaru gradually accepts Rin into his life and how their bond grows stronger over time.
One common theme could be the exploration of their relationship's growth. It might start from Sesshomaru's initial coldness towards Rin and how it gradually thaws as they get closer. Another theme could be the acceptance within the demon world, as Sesshomaru is a powerful demon and Rin is human - or at least was human originally. And there could also be themes of family, as they build a life together and perhaps face issues related to having children or integrating into each other's 'familial' circles.
One common theme is the idea of overcoming differences. Sesshomaru is a demon and Kagome is a human with spiritual powers. Their different natures often create conflict at first but then they learn to accept and even rely on each other. Another theme is growth. Both characters usually grow as individuals throughout the story, influenced by their interactions with each other.