Well, obviously Rias herself would be a central member. Then there could be Akeno Himejima. She has a mysterious and alluring personality, and her relationship with Rias could be an interesting dynamic when Naruto enters the picture. Also, Koneko Toujou, with her cute and somewhat tsundere nature, might be another member. She could be initially cold to Naruto but gradually warm up to him.
The concept of a harem itself is appealing. It allows for complex relationships, character interactions, and a lot of room for creativity. In the case of Naruto and Rias, it's exciting to imagine how Naruto's ninja skills and values would interact with Rias's world and the other characters in the harem. There can be battles, romances, and lots of drama.
One interesting Naruto Rias harem fanfiction is 'Naruto: The Harem King'. It combines the elements of Naruto's world and the harem concept with Rias. In this story, Naruto finds himself in a new situation where he has to deal with the complex relationships in a harem with Rias as a central character.
There are often fanfics that center around the characters' adventures rather than romantic or inappropriate relationships. For example, stories where Naruto and Rias team up to face a common enemy from both of their worlds. These types of stories can be really exciting and are usually free from any lemon or adult - themed content. You might have to dig a bit through the search results, but they're out there.
Character development is a key element. You want to see how Naruto and Rias, as well as the other characters in the harem, grow and change throughout the story. For example, Naruto might learn new ways of using his chakra in the DxD world, and Rias could gain new leadership skills from Naruto's example.
A frequent plotline is the training aspect. Naruto could teach some of Rias's peerage his ninja training techniques, which would be quite different from the normal training in the devil world. This can lead to new power - ups for the characters. There are also plotlines where Naruto is mistaken for a powerful devil or some other supernatural being in the 'High School DxD' world. This misunderstanding can create a lot of chaos and interesting story developments as he tries to clear his name while also dealing with Rias's harem and the various factions in that world.
Naruto's ability to create shadow clones could be used in strategic ways in Rias's battles. For example, he could send clones to scout out the enemy while the devils in Rias's harem set up their attacks. His Rasengan could also be combined with the devil's energy - based attacks. Maybe a devil could enhance the power of the Rasengan with their own magic. Also, Naruto's chakra control could help the devils in Rias's group to better control their own internal energy sources, as chakra control is a very refined skill in the 'Naruto' universe.
I'm not sure if there is a specific 'naruto x rias lemon fanfic' available. There are countless fanfictions out there, but the 'lemon' tag often indicates adult - themed content which may not be widely accessible or appropriate. You can try searching on some well - known fanfic platforms, but keep in mind the content regulations.
A more complex plot could be that there is a powerful enemy that threatens both Naruto's world and the world of Rias. Naruto and Rias's harem have to team up to defeat this enemy. Along the way, they face many challenges that test their abilities and relationships. Naruto's positive attitude and never - give - up spirit start to influence the members of the harem, and they in turn show Naruto new ways of using magic and power.
They would likely start with some mutual curiosity. Naruto would be intrigued by Rias's devilish appearance and powers, while Rias would be interested in Naruto's ninja abilities. They might exchange stories about their respective worlds, with Naruto talking about his village and his friends, and Rias sharing about the devil society. Interaction could also involve sparring sessions to test each other's strength.