A possible plotline in a 'female Harry Potter adopts Naruto' fanfiction could be that the female Harry Potter is exploring different dimensions as part of her magical studies or research. She discovers Naruto's world and is immediately intrigued by Naruto's determination and spirit. She decides to adopt him and bring him back to the wizarding world for a while. In the wizarding world, Naruto could face new challenges and learn about magic, while also showing the wizards his unique ninja abilities. This could cause a stir in the wizarding community. Meanwhile, back in Naruto's world, his absence might lead to some changes or concerns. Eventually, they would have to figure out how to balance the two worlds and their different powers while maintaining their newfound relationship.
One possible plotline could be that the female Harry Potter stumbles upon Naruto's world through some sort of magical accident. She then realizes Naruto's situation and decides to take him under her wing, teaching him about magic in the process. Another could be that she is sent on a mission to Naruto's world for some magical reason and sees Naruto's potential and adopts him as her protege to help him grow stronger both in ninja skills and, with her help, in magic as well.
One possible plotline could be that the female Harry Potter, with her new kitsune powers from the Naruto universe, uses them to fight the dark forces in the Harry Potter world in a different way. For example, she might use her kitsune illusions to deceive Voldemort.
One plotline could be Naruto being a transfer student at Hogwarts. He might struggle to adapt to the magic system while also showing off his ninja skills. Another could be Naruto teaming up with Harry Potter to fight a common enemy that threatens both the ninja world and the wizarding world.
One possible plotline could be that Harry, having seen the destruction Tom Riddle caused as Voldemort, decides to take young Tom under his wing to prevent him from going down that dark path. He could introduce Tom to the love and friendship he never had, like the friendships Harry formed at Hogwarts. This new environment and positive influence might change Tom's view of the world.
Perhaps in the fanfiction, Harry adopts Tom Riddle when he's still a young boy at the orphanage. Harry then uses his own experiences of growing up without parents to bond with Tom. He teaches Tom about magic in a different way than Dumbledore did, focusing on the positive aspects of magic for good. This could lead to Tom not becoming the evil Voldemort we know.
One possible plotline could be that Harry, through some magical accident, gets transported into Naruto's world. There, he meets Kurama and is immediately in awe of the powerful fox. He then tries to learn from Kurama about power and how to use it in a different way than he's used to in the wizarding world. Another plotline could be that Kurama's spirit somehow enters the Harry Potter universe and Harry is the only one who can sense it. He then has to figure out how to deal with this strange entity while also keeping it a secret from others in Hogwarts.
One possible plotline is that Harry is magically transported to the Naruto world and discovers Naruto is in danger from a new, powerful enemy. Harry then uses his magic to fight alongside Naruto and his friends, saving Naruto in the process.
One possible plotline could be Naruto trying to find a way to visit the Harry Potter world. He might search for some kind of magical portal or a powerful spell that can transport him there. Another plotline could be Naruto using the ideas from Harry Potter books to improve his ninja techniques. For example, he could learn about the concept of wandless magic and try to apply it to his chakra control.
One interesting plotline could be Lucius' internal struggle. He's a Death Eater, but now he has Harry Potter, the Boy Who Lived, under his roof. He might have to hide Harry from Voldemort while also trying to figure out his own feelings towards the boy. Another could be Harry's adjustment. He's used to the Dursleys' neglect, so living with the Malfoys, with their wealth and different kind of 'care', is a whole new world for him. And then there could be the reactions of the wizarding world. The Order of the Phoenix might suspect Lucius has ulterior motives, while the Death Eaters could see Harry as a new target or a tool to use against Lucius.
One possible plotline could be Minerva helping Harry discover his true magical potential outside of just the Boy - Who - Lived status. Maybe she teaches him advanced magic that Dumbledore didn't have time for. Another could be Minerva protecting Harry from the darker elements in the wizarding world, like the Death Eaters, in a more motherly way. She might also introduce him to different magical cultures that he was previously unaware of.
A great plotline might be that Snape adopts Harry secretly at first. Harry starts to notice some changes in his life, like getting better study materials and more personal attention in his magical education. As time goes on, Snape has to face his own demons while raising Harry. He might struggle with his past hatred for James Potter while seeing James in Harry. At the same time, Harry could be trying to figure out why Snape is being so nice to him all of a sudden, which could lead to a journey of self - discovery for both of them.