Well, a plot could involve a human being magically transported to Luna's realm. The human is from a world that has forgotten about magic, and Luna is intrigued by this strange being. They start to exchange knowledge, the human teaching Luna about human technology and Luna teaching the human about magic. This could lead to a deep connection as they both learn from each other. Another plot might be a human with a troubled past who finds solace in Luna's presence. Luna, in turn, sees in the human a chance to prove that she can be a guiding light not just for ponies but for other beings as well.
One idea could be that a human stumbles into Equestria and meets Princess Luna. Luna is initially suspicious but as she gets to know the human, they form a bond over their shared love for stargazing. Another could be a human who has the power to enter dreams like Luna, and they team up to fight a nightmare - inducing villain in both the human world and Equestria. Or perhaps a human artist who is inspired by Luna's beauty and grace, and through his art, he catches her attention and a friendship develops.
A plot idea might involve Baby Princess Luna having a dream where she travels to the future and sees herself as a great queen. She then wakes up determined to start learning all the things she'll need to know. So she tries to follow around the older princesses and imitate their lessons, but she often misunderstands and does things in her own unique, cute way. For example, she thinks that 'diplomacy' means sharing her toys with everyone in the kingdom.
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.
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 interesting story could be about a human who accidentally stumbles into Luna's realm. In this fanfic, the human initially fears Luna but then comes to understand her. They go on adventures together, exploring the magical aspects of Luna's world that the human has never seen before.
A plot could involve Isabelle having special powers that she doesn't fully understand. A human scientist discovers her and tries to study her, but they gradually form a bond as the human helps Isabelle understand her powers better. This could lead to a story of friendship and self - discovery against the backdrop of a world that doesn't quite understand their relationship.
One idea could be that a human scientist is working on a project related to Mewtwo's powers. They start to communicate on a deeper level, and Mewtwo begins to see the human as an ally rather than an enemy. The human, in turn, tries to understand Mewtwo's complex emotions.
A mermaid x human fanfic could start with a human sailor getting lost at sea. A mermaid finds him and guides him to safety. As a result, they develop a relationship. They might face challenges like the mermaid's family not accepting the human or the human having to keep the mermaid a secret from his own kind. Another plot could be a young girl who has always dreamed of mermaids and one day, while swimming, she actually meets one. They become friends and the girl starts to learn about the mermaid's culture and way of life. And yet another idea is a mermaid who is curious about the human world above water and she meets a human who is equally curious about her world. They embark on a journey of discovery together.
There are many great Princess Luna human fanfiction stories. For instance, some focus on Luna's struggle to fit into human society. She has to learn human customs, which can be quite comical at times. Some fanfictions might have her attending a human school and dealing with bullies or making new friends. It's really fascinating to see how she adapts her magical abilities and royal demeanor to the human environment.
One plot idea could be a human soldier being captured by a Viper. Instead of killing the human immediately, the Viper discovers an unexpected connection with the human. Maybe they both have a shared memory from a past encounter with a third alien species that makes the Viper spare the human. Then, they form an uneasy alliance to face a greater threat in the Xcom universe.
One idea could be the symbiote giving the human male some extraordinary powers, like enhanced strength and agility. The male then has to learn to control these new abilities while hiding them from the world. Another plot could involve the symbiote having a mind of its own and conflicting with the male's moral code. For example, the symbiote might want to take revenge on someone who wronged it in the past, but the male is against violence.