One possible plot could be that the girl discovers a hidden part of the island. Maybe she stumbles upon a cave filled with strange markings and ancient artifacts. She then tries to figure out what they mean and how they relate to the island's history. This could lead her on a journey of self - discovery as well as uncovering the secrets of the island.
Well, she could form an unlikely alliance with one of the boys on the island. They might start off not getting along, but as they face challenges together, like a shortage of food or a wild animal threat, they begin to trust each other. Their friendship could then be a central part of the fanfic, with them learning from each other's strengths and weaknesses.
It could be one of the older boys who is power - hungry. He sees the girl as a threat to his leadership and tries to isolate her from the group. He spreads rumors about her and makes it difficult for her to be part of the decision - making process on the island.
Perhaps a story where a group of monster girls from different parts of the island come together to protect their home from an unknown threat. A human who has some special knowledge or ability gets involved and they all have to learn to work as a team. This could involve a lot of character development as they overcome their differences and prejudices.
Another idea for the Naruto deserted island fanfic is that Naruto is sent to the island as a form of training. He initially struggles to adapt to the harsh environment. However, as time passes, he learns to control his chakra in new ways, perhaps by using the natural elements of the island. He could also meet a hermit on the island who teaches him some unique ninja techniques.
Well, for 'lotf fanfiction', you could write about an alternate ending. For example, instead of the chaos that ensued, the boys manage to establish a more harmonious society right from the start. You could also focus on a particular character's backstory that wasn't fully explored in the original, like Piggy. What if he had some hidden skills or knowledge that could have changed the course of events? Additionally, you could create a story where the 'beast' is actually a misunderstood entity, and the boys come to realize this through some series of events.
One possible plot could be that Edward, now as a girl, has to deal with the different reactions of his friends. For example, Alphonse might be a bit confused at first but quickly adapts and becomes very protective. Edward could also face new challenges in his alchemical studies as some traditional alchemy is male - dominated. And he might have to struggle with his own self - identity, trying to figure out if he still has the same goals and values as before the transformation.
Maybe the girl in the fanfiction is a very strong - willed character. She could find a hidden part of the island that has resources the boys don't know about. She uses this to her advantage to gain power among the group on the island. As she tries to establish order, she faces challenges from the boys who are used to their own chaotic ways.
One idea could be a human character getting lost on Monster Girl Island and having to form alliances with different monster girls to find a way back home. Each monster girl has her own unique abilities and personalities, like a mermaid - like monster girl who can help navigate the island's waterways.
Well, it could be about a female donkey's adventures on Pleasure Island. Maybe she discovers unique landscapes and makes friends with the local creatures there.
A possible plot for this fanfic could involve Naruto being teleported to a deserted island which has an abundance of lemon trees. As he tries to figure out how to get back home, he starts to experiment with the lemons. He might find that the lemons have some sort of energy that he can harness. This could attract the attention of some local island spirits or creatures. Naruto then has to use his ninja powers and the power of the lemons to either befriend or defeat these beings in order to find a way off the island.
A plot could revolve around a new resident on the coral island who has the power to communicate with the sea creatures. They use this ability to save the coral reefs from a mysterious threat, like a strange pollution or a new invasive species.