There could also be a theme of self - discovery. Each character might be on a path to learn more about themselves, and their relationship with the other person helps in that process. For example, Neil might learn something new about himself because of Harrison, and vice versa.
I'm not sure specifically about Harrison and Neil fanfics that are non - nsfw. But you can try searching on popular fanfic platforms like Archive of Our Own. You can filter by the relationship tag and then look for ones that are rated general or teen.
The fanfics also often feature their interactions with other Hermitcraft members. Maybe they are part of a team in a server - wide competition, and the story shows how their relationship affects the team dynamics, with their unique bond adding an interesting element to the group's progress.
A common theme can be the exploration of their pasts. How they became heroes, what influenced their development, and how their pasts might intersect. This can lead to stories of them understanding each other on a deeper level. Also, themes of redemption can be present, especially when it comes to Endeavor's complex character arc. Fanfics might show how Eraserhead's presence and their relationship could play a part in Endeavor's journey towards redemption in a non - sexual, more character - growth - oriented way.
One common theme could be friendship. Prussia and Canada are both unique characters, and their friendship could be explored, like how they might bond over shared interests or experiences within the Hetalia universe.
One common theme is his journey of self - discovery. Since he has a complex backstory, fanfics often explore how he comes to terms with his past. Another theme could be his loyalty to his friends or allies. For example, stories might show how he stands by the main character in difficult situations. Also, his struggle with his vampiric nature in a non - sexual way, like how he copes with the need for blood and the moral implications of it.
There could also be a theme of self - discovery. As they interact, both characters might learn more about themselves. Spinel could come to terms with her past and find a new purpose, while Pearl could discover new aspects of her personality through her relationship with Spinel. This can be a very engaging and emotional theme in non - NSFW Spinel x Pearl fanfics.
One good theme could be their teamwork. They could be on a quest to solve a mystery or protect their world together. Another theme might be their mutual growth. They can learn from each other's strengths and weaknesses. For instance, Pearl could learn from Garnet's calmness in tough situations, and Garnet could learn from Pearl's precision.
One popular theme is their friendship. Many fanfics explore the deep bond between Shane and Ryan, like how they support each other during their investigations. Another theme could be their adventures in different spooky places. Writers might focus on how they react to the strange things they encounter together.
A great theme could be their brotherly bond. Focus on how they protect each other during battles or how they help each other out with their respective skills. For instance, Raph's strength and Donnie's intelligence can be combined in interesting ways in the story.
One popular theme is their growth as shinobi. It could show how they train together and improve their skills. Another is their friendship, like how they support each other through tough times. Also, the idea of them exploring new places in the Naruto world as a team is quite common.