There's also the possibility of some original characters being part of Robin's harem. For example, a new female meta - human who joins the Young Justice team and is immediately drawn to Robin's leadership skills and charm. Or a civilian girl who Robin saves and then she becomes infatuated with him and finds a way to be involved with the team, thus becoming part of the harem.
M'gann could also be part of it. Her kind and empathetic nature might lead her to develop deep feelings for Robin. Additionally, Barbara Gordon could be included. Even though she is more associated with Batman's world, her intelligence and her possible interactions with Robin in the Young Justice context could form the basis of a romantic relationship within the harem.
Artemis could be a member. She has a strong personality and her relationship with Robin in the original series could easily develop into something more romantic in a harem setting. Another could be Zatanna. Her magical abilities and her connection to Robin through their superhero work could make her a likely candidate.
Well, in fanfiction, Wonder Girl could be one of the potential members of Super Boy's harem. Given their both being young heroes with their own strengths and insecurities, there could be a lot of room for romantic development. Another one could be Batgirl. She's intelligent and has a connection to the Batman family, which could add an interesting dynamic to the harem. Also, Bumblebee with her spunky attitude and unique powers could also be part of the harem.
Neville could be an interesting addition. He has grown a lot throughout the series and his kind heart might make him attracted to Harry and Luna's group. Also, Cho Chang might be in the mix. Even though she had a past with Harry, she could be part of the harem as she might be intrigued by the new dynamic with Luna involved. There could also be some new characters introduced, like a foreign exchange student who is drawn to their group's unique magic exploration and the relationship between Harry and Luna.
In a crossover with the Bleach universe, Orihime could be part of Gohan's harem. Her kind and gentle nature might be attracted to Gohan's heroism. Rukia, with her strong will and sense of justice, could also find herself drawn to Gohan's similar qualities.
In a crossover with Naruto, Sakura could be a potential member. She's strong - willed and might be attracted to Ichigo's power. From Fairy Tail, Erza could also be part of the harem. Her no - nonsense attitude and strength would make for an interesting dynamic with Ichigo. And from One Piece, Nami could be in the harem. Her intelligence and love for treasure might draw her to Ichigo.
Sakura could be a potential member. She has always had a connection with Naruto, and in this harem scenario, her feelings could develop further in a different way. Also, Hinata, with her long - standing love for Naruto, might be part of it.
Sakura could be a potential member. She's strong - willed and has her own set of skills. Hinata is also a possibility as she is kind and has always had feelings for Naruto. Ino could be in the harem too with her mind - related abilities. And Tenten, with her weapon skills, might also be an interesting addition.
Artemis might also be a part of it. She's a strong and independent character, and her dynamic with Superboy could add an interesting layer to the harem. Their interactions could range from friendly banter to more intense emotional moments.
Astrid is an obvious choice. She already has a close relationship with Hiccup in the original story. Then there could be Ruffnut and Tuffnut's sister, who might see Hiccup in a new light and be attracted to his growing confidence. Also, some new characters from unexplored Viking tribes could be part of it. Maybe a healer from a far - off land who is intrigued by Hiccup's connection with dragons.
Arwen could be a potential member. She is a beautiful and strong - willed Elf, and Naruto's different - world charm might attract her. Eowyn could also be in the harem. She is a fearless warrior, and Naruto's equally brave nature could make them connect. And perhaps Galadriel, with her wisdom and power, would be intrigued by Naruto and his unique abilities, so she could be part of the harem as well.
Velvet could be a potential member. She's kind - hearted and might be attracted to Cardin's more confident side. Another could be Pyrrha. She's always looking for new relationships and experiences, and Cardin's unique personality could draw her in. And Coco could also be in the harem. She's bold and might see Cardin as an interesting challenge.