Neville could play an interesting role. Maybe he could be the one who discovers a new magical plant that is needed for a potion to cure an illness that Ginny or Harry contracts during their marriage. Luna could also be involved. She might come to them with some strange but useful prophecies that help them in a difficult situation, like dealing with a dark wizard who has a grudge against Harry even after the war is over.
Hermione would definitely be important. She could use her extensive knowledge to help Harry understand his creature inheritance. For example, she might research ancient texts to find out more about the origin of his inherited traits.
Ra's al Ghul is a character that would be significant in a batman arrow crossover fanfiction. As a long - standing adversary of Batman and a figure with a large influence in the criminal underworld, his presence could add a lot of depth to the story. He might be involved in a plot that spans both Gotham and Star City, pulling the strings from behind the scenes. Additionally, Black Canary from Arrow could be important. Her martial arts skills and sonic scream ability would make her a formidable ally in a fight against the combined threats that a crossover would bring.
Sasuke could also be important. He might be initially skeptical of Naruto's Sage Chakra but later see its potential and even collaborate with Naruto. Also, the Great Toad Sage is a key character. It could give Naruto new prophecies related to his Sage Chakra, leading him to new adventures and challenges. Tsunade could also play a role, perhaps in helping Naruto understand the medical aspects of Sage Chakra and how it affects his body.
Sasuke could play an important role. In different universes, he might have different allegiances or powers. For example, in a universe where the Uchiha clan was never massacred, Sasuke could be a powerful leader. Kakashi is also a great candidate. His knowledge and skills could be very useful in strange universes. And Jiraiya, he could be the one guiding Naruto through the different universes, sharing his wisdom about the various changes and how to adapt.
Well, obviously Harry himself is the central character. But aside from his friends, characters like Draco Malfoy could have a different relationship with Harry. Instead of being just a rival, he could be an ally of sorts in Harry's dark journey, or perhaps he tries to use Harry's newfound darkness for his own gain. Snape too could be important. Given his complex relationship with Harry, he might be in a position where he has to choose between helping Harry return to the light or letting him continue down the dark path.
Hermione would definitely be an important character. She's smart and resourceful, so she'd be the one researching ways to restore Harry's memory. Ron would also be crucial as he's Harry's loyal friend. He'd be there to support Harry and keep him out of trouble. Dumbledore or other wise Hogwarts professors like McGonagall could also play significant roles. Dumbledore might have some secret knowledge or plan to help Harry, and McGonagall could provide guidance and protection at Hogwarts.
Hermione would definitely be an important character. She could use her vast knowledge to help Harry throughout the pregnancy, whether it's with medical advice or just emotional support. Another one could be Dumbledore. He might offer his wisdom and protection, guiding Harry through this unusual situation. And of course, the Weasley family, especially Molly. She could be like a mother figure to Harry during this time, making sure he's eating well and taking care of himself.
Sakura could play an important role. She might be more concerned about Naruto's well - being after such a tough fight. She could also use her medical skills to help in the rebuilding of Konoha. Kakashi, too, could be significant. He could guide Naruto in understanding his new powers better and also contribute to the village's security plans.
Sakura could have a different relationship with Naruto in this fanfiction. Since Tsunade trained her, there could be more of a family - like bond between Sakura and Naruto. Also, characters like Sasuke would still be relevant. His rivalry with Naruto could be affected by Naruto's new family situation. Additionally, Shizune, Tsunade's assistant, could be involved, perhaps acting as an older sister figure to Naruto.
Hermione would surely play an important role. She could help Harry figure out the details of his inheritance, like deciphering old documents or researching the history behind it.