She could also be a love interest for one of Naruto's friends. This would create an interesting dynamic as Naruto would be caught in the middle of his friendship and his sister's relationship. For example, if she falls in love with Sasuke, Naruto would have to deal with the complications that arise from their relationship, while also trying to keep Sasuke on the right path.
The older sister could act as a mentor. Since she's older, she might have more experience at Hogwarts and could guide Hermione through the social and academic aspects. For example, she could tell Hermione which professors are more lenient and which ones to be extra careful with.
She could be a protector. Given that she's the older sister, she might feel responsible for Harry's safety. This could lead to her getting involved in battles or using her magic to shield Harry from harm.
She could play a protective role towards Harry. Since she's older, she might feel a strong sense of responsibility for her younger brother. For instance, she could be the one who first discovers some of the secrets about Voldemort's return and warns Harry.
Well, it could be about Kurenai taking on a sisterly role for Naruto. Maybe she helps him train, like teaching him some special genjutsu techniques that she's good at. She could also be there to support him emotionally, especially when he faces difficulties in the village or in his ninja missions.
In a 'naruto raised by older sister fanfiction', the older sister could be very nurturing. She might take Naruto away from the village for a while to train him in seclusion. This way, Naruto can grow stronger without the constant pressure and discrimination in the village. And when they return, Naruto surprises everyone with his newfound skills and confidence.
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 could be a mentor figure. Since she's from the Uchiha clan, she might have a deep understanding of things like chakra control and ninja techniques specific to the Uchiha. Naruto could learn a great deal from her.
Maybe an original character could be created. This sister could be a powerful and wise ninja who has been traveling the world. She comes back to the village just in time to take Naruto under her wing. She could have a special kekkei genkai that she helps Naruto understand and perhaps develop in himself.
One possible plot could be that Lemon, Naruto's older sister, helps Naruto train in some unique jutsu. Maybe she has some special knowledge passed down from their family that she imparts to Naruto, which gives him an edge in battles.
The older sister to Maria, which is Anita, plays a crucial role. She is a confidant for Maria. Maria can share her secrets and feelings with Anita. Anita also serves as a connection to the larger community for Maria. She is involved in the social aspects and the cultural norms of their Puerto Rican community. Moreover, Anita is a character who adds emotional depth to the story. Her reactions to the events around Maria, such as her relationship with Tony, create more drama and tension in the narrative.