Well, Naruto, being the open - hearted person he is, would probably be the first to accept the new situation. He might even encourage Sakura and Gaara to explore their new relationship further. Sasuke, on the other hand, might be a bit more guarded. He could see it as a potential distraction for Sakura from her ninja duties. For Gaara's friends in Suna, they might initially be suspicious of Sakura, thinking she might be using this new relationship to gain some sort of advantage. But as they get to know her better, they could realize that she truly cares about Gaara as a brother, and this could lead to more harmonious relations between the two groups of friends.
Sakura's relationship with her friends could change quite a bit. Her female friends might be curious about what it's like to suddenly have Gaara as a brother. They could also be a bit jealous of the new connection she has. As for Gaara, his relationship with his Sand ninja friends could be affected as they might see Sakura as an outsider at first. But as time goes on, they could all learn to accept the new family situation and it could even lead to some joint training sessions and better cooperation between Konoha and Suna.
If Sakura and Pein were siblings, it could potentially change the power dynamics in the Naruto universe. For example, Sakura might be able to influence Pein's actions to some extent. She could try to persuade him to avoid attacking Konoha or at least reduce the destruction. This could also change the way the other characters in Konoha view her, as she would be related to one of their most dangerous enemies.
In such a fanfiction, their relationship could develop in a rather complex way. Gaara, due to his past traumas, would be hesitant to open up completely. Sakura, with her empathetic nature, would try to understand him. They would start with small conversations about their villages and their dreams. As they share more, they realize that they are both lonely in their own ways. Their relationship would then progress as they support each other through difficult times, like when Gaara has to deal with political unrest in the Sand Village and Sakura has to face her own insecurities within the Leaf Village.
If Gaara and Naruto are brothers, it could lead to a much closer alliance between Suna and Konoha. The two villages might start sharing more resources, like ninja training techniques. For example, Konoha could learn more about sand - based jutsu from Suna, and Suna could benefit from Konoha's more diverse range of ninja skills.
Some of their friends might be initially shocked. For example, Hermione might be a bit taken aback as she is used to Harry being more focused on the fight against Voldemort. But she would eventually come around. Ron, on the other hand, might tease Harry a bit at first but support them in the end.
A pregnancy would likely strengthen their relationship. They would become more reliant on each other, sharing the joys and fears of impending parenthood.
Gaara's past experiences of loneliness have made him cherish relationships deeply. So in the love triangle, he would be very sincere and committed in his feelings. He might try to communicate openly with the person he loves. Sasuke, on the other hand, has trust issues due to his past. His personality could lead to him being secretive about his feelings, which would create misunderstandings in the love triangle. He might also be more competitive towards Gaara, adding more tension to the relationship.
In such a fanfic, their relationship could be full of tension. Gaara's possessiveness might cause Sakura to push back, creating a cycle of conflict and resolution. As they face various challenges together, they could start to respect each other more. For example, when they are on a mission and have to rely on each other's skills, this mutual dependence could soften their initial stances towards one another and strengthen their relationship.
Well, if Hermione and James were siblings, it would completely change Harry's story. For starters, Hermione would have a closer connection to the Potter family. She might have grown up knowing about the prophecy and could have been better prepared to protect Harry. Also, James' relationship with Sirius and Remus might be different with Hermione as a sister. She could have influenced their dynamic and maybe even joined their group earlier. In school, Hermione's intelligence combined with her connection to the Potters could have made her a more prominent figure in dealing with the early threats from Voldemort.
Their relationship could develop into a strong friendship. As they face the challenges of time travel together, they rely on each other. Gaara might open up more to Sakura, sharing his thoughts and fears, and Sakura would be there to support him with her kind heart.
Their relationship could develop in a slow and tentative way. At first, Gaara might be indifferent to Sakura. But as they interact more during the Chunin Exams, for example, in team battles or while facing common challenges, he might start to notice her strength. Sakura, on the other hand, could initially be scared of Gaara but then realize there is more to him. This realization could be the start of a bond between them.