I'm not sure specifically about Link x Riju pregnant fanfictions. Fanfiction is a vast world and it can be difficult to know for sure if such a specific type exists. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net.
There could be a 'riju x link fanfic' where Riju is training under Link to become an even greater warrior. Their training sessions are filled with challenges and moments of mutual respect that gradually turn into deeper feelings.
One great Riju x Link BotW fanfiction is 'The Desert's Bond'. It beautifully explores their relationship as they face challenges together in the Gerudo Desert. The author does an amazing job of portraying Riju's admiration for Link and how Link gradually comes to respect and rely on her in return.
Fanfiction.net could also be a potential source. There are tons of fanfictions there, and if you search specifically for 'link x riju', you might find some interesting reads. Just be aware that the sorting and quality control might not be as good as on some other platforms.
FanFiction.net could also be a place to search. There are many Zelda - related fanfictions there. Just type in 'Link x Riju pregnant' in the search bar and see what comes up. However, not all fanfictions on this site may be of high quality, so be prepared to sift through some not - so - great ones.
The contrast between their characters is appealing. Link is this silent, heroic figure, while Riju is a young, strong - willed Gerudo leader. Their interactions can be really interesting as they come from different worlds.
I'm not sure about specific 'link x riju fanfiction' stories off the top of my head. But you can try searching on fanfiction platforms like Archive of Our Own. They usually have a wide range of fan - created stories based on different pairings.
Some fanfictions may involve time - travel elements. For instance, Link could accidentally get sent back in time and meet a younger Riju. This would create an interesting dynamic as he tries to find his way back to his own time while also protecting the past version of Riju and her village from threats that he knows are coming in the future.
Begin with a strong opening scene. For example, you could start with Riju observing Link from afar during a battle. Describe her admiration for his skills. Then, introduce dialogue or inner thoughts to show her interest in him. As you write, keep in mind the lore of the Zelda universe and make sure the story fits within that framework.
Some Zelda - specific forums might also have fanfiction sections. Here, you can often find fan - created stories that are shared within the community. These can sometimes offer a more niche or unique take on Link and Riju's relationship compared to the larger fanfiction platforms.