Perhaps in the fanfic, Luna has a nightmare about her past as Nightmare Moon. She wakes up crying because she fears that she could lose control again and turn back into that evil form. This would show her internal struggle with her own identity and the fear of repeating her past mistakes.
Well, it could be that Luna, from My Little Pony, gets into some kind of danger in a world where Naruto also exists. Maybe there are dark forces threatening Luna, and Naruto, with his ninja skills and sense of justice, decides to protect her. He might use his shadow clone jutsu to surround and guard her, or his rasengan to fend off attackers.
One possible plot could be that the ninja is from a far - off land and somehow gets transported to Equestria. Luna discovers the ninja and is both intrigued and cautious. They then have to work together to solve a mystery that threatens Equestria, like a dark magic that is starting to spread.
One possible plot could be that Harry is lost in the MLP world and Luna is the first to discover him. She helps him adapt to this new world filled with ponies, and as they spend time together, they start to fall in love. Along the way, they might have to face some villains from the MLP world who don't like the idea of an outsider like Harry being there.
One idea could be a story where Luna and Sombra meet in a dream realm. Luna, being the princess of the night, has the power to traverse dreams. Sombra, once a powerful and dark figure, could be lost in this dream realm. Luna tries to understand his past and help him find redemption. It could explore themes of forgiveness and the power of understanding.
A really exciting plot could involve a mysterious force that is causing the moon to act strangely. Princess Luna, as the princess of the night, is deeply concerned. Pipsqueak accidentally stumbles upon a clue while playing. He teams up with Luna to solve the mystery. As they work together, they learn about each other's strengths and weaknesses. Pipsqueak's small size allows him to access places Luna can't, and Luna's powerful magic protects them from various threats they encounter during their investigation.
One idea could be that a human stumbles into Equestria and meets Luna. Luna is intrigued by this strange being from another world and they go on adventures together, exploring the magic of Equestria. The human could teach Luna about human culture and in return, Luna could show the human the wonders of pony magic.
Well, one possible plot could be that they start as enemies as in the original lore. But then, an external threat forces them to work together. They gradually learn about each other's pasts and find some common ground. Maybe they both had difficult upbringings in different ways. And in the end, they form an unlikely alliance that changes the power dynamics in Equestria.
The plot could revolve around a competition. Prince Artemis challenges Princess Luna to a series of tests to prove which one is more powerful in controlling the night - related magic. As they go through the challenges, they start to respect each other more. In the end, instead of a clear winner, they realize that by working together, they can achieve even greater things with their magic.
A fanfic titled 'Luna's Redemption in Celestia's Eyes' is quite interesting. It focuses on Luna's journey towards redemption from Celestia's perspective. It shows how Celestia has always believed in Luna, even during her darkest times. The story is filled with emotional moments that really tug at the heartstrings.