It might be a simple matter of territoriality in the fanfiction. Naruto has his own group of friends and comrades in his own universe. When he encounters Rias Peerage, he could feel threatened by their presence or the way they interact with the characters in his world. Also, the power structures are different. Naruto's power comes from his own training and the chakra within him, while the Peerage gets power from different sources like contracts and devil heritage. This disparity could lead to dislike.
One possible reason could be a misunderstanding. Fanfiction often plays with the idea of miscommunication between different fictional universes. Naruto may misinterpret the actions of Rias Peerage. For instance, if they are on a mission in Naruto's world and their actions seem suspicious to Naruto, he may jump to the conclusion that they are up to no good and start to hate them without fully understanding their motives or the way their world operates.
It could also be due to a power struggle. Naruto is extremely powerful and independent. If Rias or other members of the peerage try to control or limit his power in some way, he would not tolerate it. His power is a part of who he is, and he's used to using it freely to protect others. So this could lead to his departure from the peerage.
One possible reason could be a desire for self - discovery. Issei might feel that being in Rias' peerage limits his growth in certain ways. He may want to explore his powers and identity on his own terms.
Well, in fanfiction, the idea of Naruto hating Athena could be due to a clash of their worlds. Naruto comes from a ninja - based world in his original story, full of chakra and shinobi clans. Athena is from Greek mythology, often associated with wisdom and war in a very different context. Maybe in the fanfiction, their values or goals are set up to be in opposition, leading to Naruto's hatred. For example, if Athena's wisdom is seen as a threat to Naruto's way of doing things in the fanfiction world.
In fanfiction, Naruto hating his sister could be due to various reasons. Maybe the writer wants to create a new and complex dynamic. However, in the original Naruto series, Naruto doesn't have a sister, so it's all fictional creation. It could be that the sister character is written to have done something really bad to Naruto or his friends, which makes him hate her in that particular fan - made story.
In a Naruto - Rias' peerage fanfiction, the story might focus on how Naruto's chakra system interacts with the devil's power. For example, his ability to sense chakra could be enhanced or changed when combined with devilish senses. Also, his relationship with the members of the peerage would be interesting. He could form strong bonds with some, like Kiba in Naruto's world, he might get along well with the werewolf in Rias' peerage.
Naruto in Rias' peerage would be quite a sight. His orange jumpsuit would stand out among the devils. He might use his shadow clones to do multiple tasks within the peerage, like scouting or helping with household chores. His positive attitude would also have an impact on the often - serious devils in the peerage.
Naruto would probably interact with the other members in a very friendly and enthusiastic way. He's always been the type to make friends easily. He might share his ninja stories with them, and they in turn could share their own experiences in the supernatural world. His positive attitude could brighten up the group and break the ice in any tense situations.
Well, Naruto might bring his unique ninja skills into the peerage. He could teach the others some cool jutsu like the Shadow Clone Jutsu. His strong willpower would also likely influence the group dynamics. Maybe he'd start a friendly rivalry with some of the more powerful members of the peerage.
In this fanfiction scenario, Naruto's unique abilities like his shadow clones and rasengan would be interesting to see in the context of being kidnapped by Rias Peerage. Maybe the Peerage kidnapped him because they saw his power and wanted to use it for their own purposes. Naruto might resist and start training in secret to get stronger and break free. He could also form an alliance with other characters who oppose Rias Peerage in their world.
One possible reason could be Naruto's independent nature. He has always been someone who forges his own path. In the Naruto series, he doesn't rely on traditional forms of status or hierarchy. So in the fanfiction, he might refuse peerage because he wants to be recognized for his own efforts and not because of a title.