Another interesting pairing could be with Dumbledore. Fem Merlin could offer a different perspective on magic to Dumbledore, and they could work together to protect Hogwarts and the wizarding world. Their combined wisdom and magic could be a formidable force against any dark forces in the fanfiction.
Lestrange and Remus Lupin could also make an interesting pair. Lupin's calm and empathetic nature could contrast with Lestrange's volatile and dark personality. A fanfiction could explore how Lupin might try to understand what led her to the dark side and if he could possibly bring out any good in her.
I think Gaius would be an excellent character to include. His wisdom and knowledge of magic could be really useful for Roxy Morton and Merlin. Then there's Lancelot. His chivalry and noble nature would fit well in the story. Also, Nimueh. She has her own power and backstory that could create some intense plotlines when paired with Roxy Morton and Merlin.
Dumbledore and Lady Hela would be an interesting combination. Dumbledore's wisdom and Hela's power could lead to some intense and thought - provoking interactions. They could be on opposing sides at first, but then find common ground in their goals for the wizarding world.
Harry Potter and Jane Foster themselves are great to pair. Their different backgrounds, one in magic and the other in science, can create a lot of interesting interactions. Hermione could also be paired with Jane Foster. Hermione's thirst for knowledge and love of learning could mesh well with Jane's scientific mind. They could exchange ideas about different forms of knowledge. Another good pair could be Thor (since he's related to Jane Foster) and Hagrid. They both have a big - hearted and strong - willed nature and could have some fun adventures together in a fanfic.
Dumbledore and Tony could make for an interesting combination. Dumbledore's wisdom and power could be contrasted with Tony's more down - to - earth and sometimes sarcastic personality. It would be fascinating to see how Dumbledore would handle Tony's modern - day sensibilities and how Tony would react to Dumbledore's magical authority.
One character that would be great to pair with Harry and Tom is Remus Lupin. His kindness and understanding, as well as his own struggle with his werewolf side, could provide a different angle on dealing with Tom's darkness and Harry's heroism. Another good character is Bellatrix Lestrange. Although she was on Voldemort's side, her fanatical loyalty and powerful magic could make for an interesting dynamic in a fanfic where she might have to interact with Harry and a redeemed or different Tom. And of course, Ron Weasley. His friendship with Harry is well - known, and his reactions to Tom Riddle and the situations involving him could add humor and a down - to - earth element to the fanfiction.
Draco Malfoy himself. In fanfiction, it could be interesting to explore how Draco reacts to his father Lucius' relationship (be it positive or negative) with Harry. It would add family drama and also show Draco's growth in different scenarios.
Fred and George Weasley could be really fun to include. Their prank - loving nature and inventiveness could add some humor and unexpected solutions to the problems the Golden Trio might face in fanfiction. Additionally, Remus Lupin would be a great fit. His knowledge of dark creatures and his kind heart could make him a valuable ally for the trio.
Naruto himself is a great choice. Their personalities are so different that it can create a lot of interesting interactions. Naruto's positive and determined attitude can contrast with fem Zetsu's more mysterious nature.
Iruka sensei could also be a good pairing. He has always been a mentor figure to Naruto, and in a fanfiction where fem Naruto sings, he could be the one to encourage her and help her develop her talent further.