One common theme is discovery. Link discovers new parts of the world, new creatures, or new powers in these fanfictions. For example, he might find a hidden grove in the wild where a magical creature gives him a special ability.
Another theme is the bond between man and nature. Link's encounters in the wild often highlight his relationship with the natural world in the Zelda universe. He might have to work with the wild to overcome a threat or learn from it to grow stronger. It's about how he interacts with the untamed elements and how they shape his character.
One common theme is the rebuilding of Hyrule. Since Link and Zelda are often seen as the saviors of the kingdom, in married fanfictions, they take on the task of making Hyrule a better place together. Another theme is the exploration of their new - found relationship dynamics, like how they communicate and make decisions as a married couple.
There's a fanfic called 'Link's Wild Adventure'. In this story, Link stumbles upon a hidden part of the wild where he meets a strange and powerful being. The story is full of action and mystery as Link tries to figure out how this encounter fits into his overall journey in the Zelda universe. It also has some really interesting character development for Link as he adapts to this new situation.
Often, the theme of redemption or reward is present. Link has gone through so much in his journey, and a kiss from Zelda can be seen as a sort of reward for his efforts. Also, themes related to the magic and mystery of Hyrule are common. The kiss might be tied to some magical event or discovery in the fanfiction. For example, it could unlock a new power or reveal a hidden secret about the land.
One possible plot twist could be that the two Links are from different timelines and their meeting causes glitches in the fabric of the Zelda universe. For example, the meeting might disrupt the natural flow of events, leading to unexpected changes in the locations of dungeons or the behavior of enemies.
Common themes include the power of their connection. In the Zelda universe, there are many magical elements, and their relationship can be seen as a powerful force. This can be shown through how they work together to overcome obstacles. Another theme is the internal struggle. For example, Fi may struggle with her programming and emotions as she falls in love with Link. And of course, the theme of adventure is always present, as they journey through the world of Zelda together, with their relationship evolving along the way.
The theme of growth is also present. As Link grows and changes through his adventures, his relationship with Saria can also change. Sometimes, he might have to make difficult choices that affect their bond, like choosing to save the world at the cost of not being able to return to the forest as often.
One common theme is the exploration of cultural differences. Link, a Hylian, and Ruto, a Zora, come from very different cultures. Fanfictions often explore how they bridge these gaps in their relationship.
Many of these fanfictions also have the theme of growth through pain. Link's experiences of getting hurt often lead to him becoming stronger, either in terms of combat skills or in his understanding of the world around him. It shows that even a hero like Link has to face hardships and grow from them in order to fully embrace his destiny in the Legend of Zelda universe.
Their interaction might lead to the discovery of new areas. Since both Links have different knowledge and skills, they could combine their abilities to access previously unreachable places. For instance, one Link might know how to solve a certain puzzle that unlocks a hidden path, and the other Link could use his strength to open a blocked entrance to that area.
I really like the fanfiction where Link and Zelda are in an alternate universe. In this story, they are not royalty and adventurer in the traditional sense. Instead, they are ordinary people living in a small village. But, they still have that special connection that draws them together when an ancient evil from the Zelda lore starts to surface. It gives a fresh perspective on their characters.