Naruto would probably be angry at first. He's not the type to take being kidnapped lightly. He'd likely try to break free immediately using his strength and ninja techniques.
He might also try to talk his way out. Naruto is good at making friends and might try to convince the members of Rias Peerage that they don't need to keep him captive. He could tell them about his world and his reasons for being there (if there was a misunderstanding that led to the kidnapping).
Naruto's reaction to the other members would be complex. He has a big heart, but being forced into the peerage would make him resentful at first. He'd see the other members as part of the system that forced him. But as he spends time with them, he'd start to notice their individual personalities. If there are any members who are outcasts or treated unfairly, he'd side with them. His own experiences of being an outsider in his village would make him empathetic. And when it comes to their powers, he'd be eager to learn how to counter them in case he ever needed to defend himself within the peerage.
Naruto would likely be very angry at first. He is a free - spirited person who values his freedom greatly. So being enslaved would go against everything he stands for. He'd probably try to break free immediately, using his brute strength and any ninja techniques he can muster.
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.
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.
A 'Naruto is forced into Rias Peerage' fanfiction could be an exciting blend of two very different universes. Naruto, with his strong will and powerful abilities, would be a force to reckon with in the peerage. At first, there would be a lot of tension as he is forced into this new situation. He might try to find a way to escape or change the situation to his advantage. The fanfiction could show his attempts to understand the magic and supernatural elements of the peerage world, which are so different from the chakra - based ninja world he is from. There would also be great potential for comedic moments, like when Naruto's straightforward and sometimes naive nature clashes with the more sophisticated or devious members of the peerage. And of course, there could be epic battles where Naruto's ninja techniques are pitted against the magical powers of the peerage members, leading to some truly spectacular fight scenes.
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 might be angry at first. He is not one to take betrayal lightly.
Naruto might be initially confused. He trusts Tsunade, so being kidnapped by her would be completely unexpected. He would probably start by asking her why she's doing this.
Naruto's powers could complement the members of Rias' peerage. For example, his speed could assist in quickly getting into position during battles, which would work well with the more long - range or support - based abilities of some peerage members.
The dynamic within Rias' peerage would be greatly affected. There would be a power vacuum as Naruto is likely a strong member. His departure might cause some members to question Rias' leadership. Maybe they start to worry that if she couldn't keep Naruto, who else might leave? Also, in battles, they would have to find new strategies without Naruto's unique abilities.