I'm not sure if "Sword Dance of the Elf" is a harem anime. However, harem anime usually referred to anime or manga that featured women as the main characters, and many of the characters had romantic relationships. However," Sword Dance of the Elf " was an anime with male characters as the main characters. There was no obvious harem plot. So I can't say for sure if it's a harem anime.
In such a fanfiction, from Naruto, Sakura could be in the harem. She's strong - willed and has her own set of skills. From My Hero Academia, Ochaco Uraraka could be there. She's kind - hearted and has an interesting quirk. And of course, Hinata from Naruto is also a likely candidate with her shy yet determined personality.
There's also 'Izuku's Harem Adventure'. In this fanfiction, the author creates unique scenarios where Izuku finds himself in the middle of a harem. It has great character development for not only Izuku but also the members of his harem, exploring their individual personalities and how they interact with Izuku.
Ochaco Uraraka is a common character in the harem. Her kind and friendly nature makes her a likely candidate. Momo Yaoyorozu is also often included. Her intelligence and elegance add an interesting dynamic to the harem. And Tsuyu Asui could be part of it too, with her unique personality.
One popular one could be 'Sakura Elf Harem'. It has an interesting story line that involves the main character interacting with various elf characters in a harem - like setting.
The concept of a harem with elf characters is appealing because elves are often depicted as beautiful, magical beings. So, having a group of them in a harem setting in a visual novel offers a fantasy - like experience.
Well, Naruto is a given. Then, there may be an elf with healing powers who becomes an important part of Naruto's life in the fanfiction. There could also be an elf archer who is initially distrustful of Naruto but later warms up to him. And in the harem context, these elf characters are all vying for Naruto's attention in different ways, whether through their skills, their kindness, or their unique cultural knowledge.
In this type of fanfiction, there might be new settings. Picture an elven forest that is somehow connected to the Hidden Leaf Village. The elves could be protectors of a powerful chakra - infused artifact in the forest. As for the harem part, Naruto's interactions with the elf women could range from friendly and platonic to more romantic, with each relationship developing at its own pace and bringing out different sides of Naruto.
One common theme is the fish - out - of - water scenario. Naruto, coming from his own ninja - filled world, suddenly finds himself in an elven world with different rules, cultures and magic systems. Another theme is the building of relationships within the harem. Each elf in the harem has her own personality and Naruto has to navigate his feelings for them. Also, adventure is a big theme as they often go on quests together, fighting enemies and exploring new places.
Another theme is power - up in relation to relationships. Sometimes, the support from his harem members helps Izuku grow stronger in his hero - related abilities. It shows how his personal life can influence his development as a hero.