One of the main themes is usually the clash and subsequent融合 (combination) of different cultures. Naruto comes from a world of ninjas with a strong sense of honor and loyalty within clans, while Mara Sov has her own complex society in the Destiny universe. Their meeting often leads to exploring how these two cultures can interact.
One interesting plot could be a crossover where Naruto somehow ends up in the world of Mara Sov. He might use his ninja skills to help Mara Sov deal with her enemies. For example, his shadow clone jutsu could be used in battle strategies in her world.
You can try some popular fanfiction websites like FanFiction.net or Archive of Our Own. On these platforms, you can use the search function to specifically look for Naruto and Mara Sov fanfictions. Just type in the relevant keywords and browse through the results.
Fanfiction.net might also be a good place. However, the quality can vary more compared to AO3. But it still has a decent number of Destiny - related fanfictions. Look for the Destiny section and then search specifically for Mara Sov x female guardian stories.
There's also 'Mara Sov's Choice' which focuses on how Mara Sov chooses a particular female guardian for a special mission. As they journey together, they start to understand each other on a deeper level. It's really interesting to see how their different personalities interact and how they grow to rely on one another.
There is 'Mara Sov and the Male Guardian: A Journey'. In this fanfiction, the male guardian is assigned to protect Mara Sov during a dangerous journey across different realms. Along the way, they face numerous challenges that test their trust in each other. The author does a great job of showing the male guardian's growth as a character, influenced by Mara Sov's wisdom and mystery.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of Destiny - related fanfictions, and you're likely to find some good ones about Mara Sov and a male guardian there. Just use the search function and type in the relevant keywords.
One popular 'naruto x mara sov fanfic' might be 'The Hidden Alliance'. It's a story where Naruto and Mara Sov find themselves in a situation where they have to combine their unique skills to face a common enemy. The author does a great job of weaving their two very different worlds together.
I'm not entirely sure if there's a specific 'Naruto is Oryx fanfiction' in a widespread sense. It could be some very niche or fan - created concept. Maybe it's a crossover idea in someone's imagination where elements of Naruto are combined with something related to Oryx in a fan - written story.