One possible plot could be that Anko uses her skills and knowledge to protect Naruto from the very beginning. Since she's his sister, she might be more involved in his training at a younger age. Maybe she teaches him some of her unique jutsu privately, which gives Naruto an edge over his peers. For example, she could teach him some of her snake - related jutsu, which Naruto could then modify to fit his own style.
One possible plot could be that Naruto (as Anko's twin sister) might be more stealth - oriented due to Anko's skills. She could use Anko's knowledge of snakes and poisons in her own way. For example, in battles, she might come up with unique strategies involving snake - like movements or using non - lethal poisons to subdue opponents.
In a more magical or otherworldly fanfic, Naruto could inherit a powerful artifact or ability that binds Anko to him. This 'ownership' could then lead to a series of adventures. They might have to journey together to find a way to break the bond if Anko doesn't like it, or they could learn to make the best of it. Along the way, they could encounter various enemies and allies, and Naruto could use his ownership to help Anko grow as a ninja and as a person, while also facing his own moral dilemmas about this strange form of power over another person.
She could be involved in the Akatsuki plot in some way. In the fanfiction, she might have been sent on a mission that led her to cross paths with the Akatsuki members. This could create a whole new storyline where Naruto has to rescue his sister from the clutches of the Akatsuki, adding more depth to the Naruto universe.
She would be more of a mentor figure. Given that she's older and more experienced, she'd take it upon herself to train Naruto and pass on her knowledge. This would change her character from being just a regular shinobi to someone who has a big influence on Naruto's growth and development. She'd be constantly guiding him, both in terms of his ninja skills and his personal growth.
One possible plot could be Naruto slowly realizing his feelings for Anko during a mission they go on together. They face various challenges and Naruto starts to see Anko in a new light.
One possible plot could be that Naruto has a cold and Anko, being the tough yet caring kunoichi she is, decides to take care of him. Maybe she uses some of her unique snake - related jutsu to find rare herbs to make a special medicine for Naruto. This could lead to a deeper bond between them as Naruto recovers and realizes Anko's kindness.
One possible plot could be that Naruto, during his training, has a series of encounters with Anko. At first, they might be at odds, but as they get to know each other better, feelings start to develop. Anko could see Naruto's determination and kindness, and Naruto could be attracted to Anko's strength and unique personality. Eventually, they fall in love and face challenges together, like dealing with the ninja world's expectations of their relationship.
Well, it could be about a cold Naruto, perhaps emotionally cold after some hard experiences in the ninja world. And Anko could be a key figure in helping him thaw out. Maybe she sees his pain and tries to reach out to him in her own brash way. For example, she could drag him into some dangerous but ultimately character - building missions where Naruto starts to open up again.
One possibility could be that Naruto uses his new jutsu in front of Anko in a training session. The jutsu is so powerful and unexpected that Anko is left looking rather foolish. For example, Naruto might have developed a new type of shadow clone jutsu that has some unique properties. When he uses it against Anko during sparring, she is completely unprepared and gets outmaneuvered at every turn, leading to her humiliation.
One possible plot could be that Anko focuses on teaching Naruto some of her unique ninja techniques. For example, she might teach him how to use snake - like jutsus or some special stealth skills she has mastered. This would enhance Naruto's combat abilities and give him an edge in future battles.