In the Avatar world, Katara could be one of the potential characters. She is strong - willed and caring, and might be attracted to Naruto's determination. Toph could also be a part of it. Her tough - as - nails attitude might find Naruto's unique powers interesting.
Another plot could be that Naruto is mistaken for an Avatar in the Avatar world. As he tries to clear up the misunderstanding, he gets involved in local politics and relationships. The female characters see his honesty and kindness, and gradually, a harem - like situation develops around him.
There could also be some original female characters created specifically for the fanfiction. Maybe a female fire - bender who has a secret past and sees something in Naruto that makes her want to open up. She could be part of the harem, adding her own unique story and relationship with Naruto to the mix.
One idea could be that Naruto somehow gets transported to the Avatar world and his unique ninja skills draw the attention of multiple female characters. They might be intrigued by his determination and power, leading to a harem - like situation where they all vie for his attention.
One common theme is the power struggle. In these fanfictions, characters from both Naruto and Avatar universes often have to deal with their own powers as well as compete for the affection in the harem. For instance, a Naruto character with strong ninjutsu may have to prove himself against an Avatar character with bending abilities.
Zuko from Avatar is another popular character. His complex backstory and redemption arc make him an appealing addition to the harem. In the Naruto side, Sasuke can also be a character that shows up often. His brooding nature and powerful abilities can create interesting tensions within the harem. And then there's Tsunade, with her strength and leadership, who can bring a different kind of dynamic to the group of characters in this fanfiction.
Another concept is the power dynamics. In a harem situation, Naruto may be in a position of power in some ways, but he also has to deal with the power and influence of the other characters. And in this fanfiction where two different universes collide, there could be new power hierarchies formed. For instance, some characters might be more powerful in one aspect like combat, while others might be more influential in terms of politics or social standing.
Well, in some storylines, the characters might face unique challenges in a combined Naruto and Avatar world. For example, a character from Naruto could learn about bending from the Avatar world and use it in a creative way to overcome an enemy. However, keep in mind that fanfiction can vary greatly in quality and content.
I'm not really into that specific type of fanfiction. However, you can try looking on some well - known fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Naruto fanfictions, and you might be able to find something related to avatars and harems there.
One popular Naruto and Avatar harem fanfiction is 'The Elemental Bonds'. It combines the unique powers from both universes in an interesting way within the harem concept. The characters are well - developed and the story has a good flow.