The exploration of the power dynamics between them can also be a theme. If one has certain powers or abilities and the other doesn't, how does that affect their relationship? How do they support or rely on each other in different situations? And sometimes, there are themes related to the world they inhabit, like the cultural and social aspects that shape their lives and interactions.
Some fanfictions focus on the idea of redemption for Manji, especially if his past actions are a significant part of the original story. Rin might play a role in that redemption process, like being a guiding light for him. Also, themes of loyalty and trust are frequently seen. Their loyalty to each other in the face of danger or difficult situations is a popular plot point.
One great source could be fanfiction.net. There are often a variety of stories about different characters, including Manji and Rin. You can search by the characters' names and then look through the summaries to find ones that seem interesting. Some might be action - packed adventures that follow their journey in the original story's world, while others could be more character - study - like, exploring their relationship in depth.
Love is a common theme. Since they have a deep connection, many fanfictions explore the romantic aspect of their relationship.
Friendship is a common theme. The stories often show how Rin and the reader build a strong bond of friendship, facing challenges together and supporting each other.
A common theme is self - discovery. Rin often goes on a journey where she learns more about herself, like in many stories where she faces challenges that force her to understand her own strengths and weaknesses.
Growth is also a common theme. The family members, whether it's Kakashi, Rin or their kids, usually experience personal growth throughout the story. They learn from their experiences, overcome difficulties, and become better versions of themselves as a family.
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.
One common theme is the crossover aspect. Writers often explore how the two different universes of Naruto and Fate interact. For example, how Naruto's ninja skills would fare in the world of magic that Rin Tohsaka is from.
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.
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.