Well, from Naruto, Ino could be in the harem. She has a competitive side and a history with Naruto. Kurenai, with her mature and mysterious nature, could also be part of it. In terms of crossovers, Asuna from Sword Art Online would be a good fit. She's a strong female lead and her relationship - building skills could be put to use in a harem with Naruto. Also, Ryuko from Kill la Kill. Her wild and rebellious nature would add a lot of spice to the harem dynamic.
Definitely Hinata. She already has strong feelings for Naruto in the original Naruto series. Sakura could also be part of it as she has a long - standing relationship with Naruto. From other series, if we're doing a crossover, Erza from Fairy Tail could be an interesting addition. She's strong, independent, and would make for an interesting dynamic in a harem situation with Naruto. Also, Rukia from Bleach could be another. She has a cool and collected personality which would contrast with Naruto's more exuberant nature.
In a crossover with Fairy Tail, Lucy could be part of Naruto's harem. She is strong - willed and might be attracted to Naruto's godlike power and his kind heart. Also, from the Naruto universe, Hinata would surely be in the harem as she has always had feelings for Naruto.
Definitely Hinata. Since she has feelings for Naruto in the original series, she could be a part of the harem. Sakura might also be there as she is an important female character. From the Juubi - related side, maybe a female form of one of the tailed beasts. Also, Tenten could be included as she is a strong female ninja. And perhaps a mysterious female character who has a special connection to the Juubi's power.
Well, obviously Naruto himself would be a main character. His sister could be an original character created just for the fanfiction. In terms of the harem members, Sakura could be one. Even though she has feelings for Sasuke in the original series, in this fanfic she could see Naruto in a new light. Hinata is also a likely candidate as she already has deep feelings for Naruto. Another could be Ino, who might be drawn to Naruto's growth and newfound confidence in this alternate scenario.
In a crossover with Fairy Tail, Lucy could be part of the harem. She's a kind - hearted and intelligent wizard, and her relationship with Naruto could involve sharing magical and ninja knowledge. And from the Attack on Titan world, Mikasa might be included. Her loyalty and combat skills would create an interesting relationship with Naruto.
Definitely Naruto and the fem Kyuubi. Tenten could be part of the harem. She is a strong - willed kunoichi. Temari from the Sand Village could also be included. She has interacted with Naruto before and her feisty nature would make for an interesting addition to the harem. And of course, there could be some original characters created just for this fanfiction.
Rukia could be one of the characters. Since she has a deep connection with Ichigo already in the original series, it would be easy to develop a more romantic aspect in the harem setting. Orihime is also a likely candidate, as she has strong feelings for Ichigo. And from other animes, a character like Saber from 'Fate/stay night' could be interesting. Her noble and powerful nature would contrast with Ichigo's more rough - around - the - edges personality.
Well, obviously Lucy from Fairy Tail would be a likely candidate. She already has a strong connection with Natsu in the original series. Then from the world of Bleach, Rukia could be an interesting addition. Her cool and collected nature would contrast with Natsu's hot - headedness, and her Soul Reaper powers would add an interesting dynamic to the harem. Also, from Attack on Titan, Mikasa could be in the harem. Her strong combat skills and protective nature towards Eren could translate into a similar protectiveness towards Natsu in the fanfiction.
Gwen could be one of the characters in the harem. She already has a close relationship with Ben in the original series. Another could be Kai Green. She's shown interest in Ben before and could easily be part of a harem in a fanfiction. Also, female aliens like Rook's sister (if she exists in the fanfic's version) could be part of it.
In a crossover with Sailor Moon, Sailor Venus could be part of the harem. She is a strong fighter like Goku in her own way, and their different powers and personalities could create interesting dynamics.
Sakura would be an obvious choice. She has a long - standing relationship with Naruto in the original series. Hinata is also a likely candidate, given her feelings for Naruto. Then there are other strong female characters like Temari. She's tough and could add an interesting dynamic to the harem.