One idea could be exploring the backstories of the animatronics in more depth. For example, creating a story about how the Ballora was created and what her purpose was originally supposed to be. Another could be a time - travel fanfic where a character goes back in time to prevent the disasters at Sister Location from happening. And a third could be a story centered around the relationship between the different animatronics, like a friendship or rivalry between Funtime Freddy and Circus Baby.
One idea could be that the characters from Sister Location end up in an alternate universe where they have to team up with the original FNAF characters to fight a new, more powerful animatronic threat. This would bring a lot of interesting character dynamics as they try to figure out each other's motives and abilities.
Maybe the animatronics in Sister Location are infused with chakra due to some strange experiment. Naruto senses this and tries to understand how to use this new form of chakra. He might have to team up with some of the more 'friendly' animatronics to stop a greater evil that is threatening both the Naruto world and the FNAF world.
One idea could be that the sister of the pharaoh has a secret power that she must keep hidden from the court. Another could be her forming an unlikely alliance with a commoner to save the kingdom from a hidden threat. Maybe she discovers a long - lost prophecy about herself and the future of the pharaoh's reign.
One possible plot could be the baby character exploring the sister location and making new friends among the other animatronics there. Maybe they form an unlikely alliance to solve a mystery in the location.
A possible plot for tmnt baby sister fanfiction is that the baby sister finds an ancient artifact that has a connection to the turtles' heritage. This artifact might give her some new abilities or put her in danger as various forces try to take it from her. Maybe she befriends a stray animal that turns out to have some kind of magical or otherworldly connection. The turtles are initially skeptical but then realize that the animal is actually helpful. Additionally, the baby sister could get involved in a school project about mutants which leads to some unexpected revelations about her brothers and their place in the world.
One idea could be a story where Naruto discovers he has a long - lost sister who has unique powers. They then team up to face a new and powerful enemy in the ninja world. Another could be a plot where the sister is from a different village and they have to overcome the differences between their villages to be together as family.
Maybe Merlin's sister is sent on a secret mission by the Lady of the Lake. She has to journey to a far - off land to retrieve a magical artifact that is crucial for the future of Camelot. Along the way, she meets various characters and overcomes many challenges, all while keeping her identity as Merlin's sister a secret.
One idea could be that Bella's sister discovers a hidden power within herself. Maybe she can communicate with animals and uses this ability to protect the town from an unknown threat.
Well, perhaps Harry's sister is a bit of a troublemaker. She could accidentally get into a feud with one of the Slytherin students, and Harry has to step in to keep the peace. Or she could be really good at a subject that Harry struggles with, like Potions, and she helps him improve his skills. She might also have a secret admirer among the students, which could lead to some interesting and humorous situations.
A possible plot is that Haku's sister discovers a hidden prophecy related to Haku. She then has to figure out how to either fulfill it or prevent it from coming true. She might also form an alliance with some of Naruto's friends, like Sakura or Shikamaru, who help her understand the complex world of ninjas better and together they work towards a common goal that is also related to Haku's future.