In such a fanfiction, at first, there would be shock and disbelief on both sides. Naruto, being from a world of ninjas, and Rias, from a world of magic and devils. But as they get to know each other, they would discover similarities in their determination and loyalty. The story could involve Naruto using his shadow clones to help Rias in her battles or in dealing with the politics of her world. And Rias could introduce Naruto to new forms of power and magic that he could learn from. It would be a story of two different worlds colliding and two characters growing closer as siblings.
One possible fanfiction could be where Naruto is somehow transported to the world of Rias. Her brother, perhaps being caught up in his own duties and status, neglects Naruto. Naruto, used to being an outcast in his own village at times, initially feels a sense of deja vu. But as the story progresses, he shows his strength and determination, which gradually makes Rias's brother take notice and start to regret his neglect.
One possible fanfiction idea could be that Rias' sick brother is a key factor in a power struggle within their supernatural world. Naruto, being an outsider with his own set of skills and values, could get involved. Maybe he forms an alliance with Rias to protect her brother from those who would use his illness to their advantage.
Well, in a 'Naruto is Rias' brother' fanfiction, there would be a lot of potential for character development. Naruto, being from a world where he had to fight for his place and for the safety of his village, would bring that same determination to protect Rias and her friends. He might be shocked at first by the devil society's hierarchy and customs, but would gradually find ways to fit in and make changes. Rias, on the other hand, would have a powerful and loyal brother by her side. They could face off against common enemies, like other devils who oppose Rias' ideas or angels who see Naruto as an unknown and dangerous element. The fanfiction could also explore their family backstory, how they were separated in the first place and what it means for them to be reunited now.
Well, it could be really interesting. Maybe Naruto somehow gets transported to the world where Rias exists. He might be in awe of her power and leadership. He could learn new things from her and her group, and there could be some really cool action scenes as Naruto tries to prove himself worthy of being in her presence.
In such a fanfiction, the story could start with Naruto somehow being transported to Weiss' world or vice versa. Since Naruto is known for his strong sense of loyalty and friendship, he might initially be confused by Weiss' more complex family and social relationships. As for their abilities, Naruto could teach Weiss some of his ninja tricks, and Weiss could introduce Naruto to the power of magic. There could also be a plot where they have to work together to face a common enemy that threatens both their worlds.
In such a fanfiction, Naruto's values from his own world, like loyalty and never giving up, would likely clash and then blend with the values in Artemis' world. There could be a lot of character development as they learn from each other. Also, the story could involve Naruto using his chakra in ways that are new to Artemis' world, creating unique magical - like effects. And perhaps they would have to face a common enemy that only their combined skills can defeat, leading to a great story of brotherhood and cooperation.
In a fanfiction with godlike Naruto in Rias' peerage, Naruto would likely be a dominant force. His godlike status might mean he has even more enhanced versions of his usual powers. He could potentially teach the other members of the peerage some of his ninja ways, like stealth and quick movement. And in battles, he could turn the tide easily with his overwhelming strength.
In a Naruto and Rias kiss fanfiction, the story might start with Naruto being transported to the world of High School DxD where he meets Rias. Their personalities are quite different, Naruto being more of an open - hearted and determined ninja, and Rias being a powerful devil. Their relationship could develop gradually, and the kiss could be a culmination of their growing bond. It might also involve some cultural clashes between the ninja world and the devil world, which would make the story even more engaging.
It would probably be a wild mix of two very different universes. Naruto's ninja world and Rias' devilish world in High School DxD. There could be some interesting power dynamics, like Naruto's chakra abilities combined with Rias' devil powers. Maybe they'd face threats from both their worlds and have to use their combined skills to overcome them.
It would probably be a wild ride. Naruto's energetic and positive nature combined with Gajeel's more rough - around - the - edges personality would create some interesting dynamics. Maybe they'd team up to fight powerful enemies, using Naruto's Rasengan and Gajeel's Iron Dragon's Roar. It could also explore their family backstory, like how they came to be brothers in this fan - created universe.