Obviously, fem Naruto herself is a main character. Her father, Minato Namikaze, and her mother, Kushina Uzumaki, are the ones she is going to meet. There might also be other characters from the Naruto universe like Jiraiya, who was Minato's teacher and could potentially be involved in the story, perhaps as someone who helps facilitate the meeting.
In this fanfiction, fem Naruto is the protagonist who will meet her parents. Her parents, Minato and Kushina, are the key characters she'll interact with. But don't forget about the Nine - Tailed Fox. Since Kushina was the former Jinchuriki of the Nine - Tailed Fox and Naruto (fem version) is also related to it, the Nine - Tailed Fox could have some sort of presence or influence in the story. Maybe it helps in the reunion or has some special connection to the family's past that is revealed during the meeting.
Well, it could be that fem Naruto meets her parents in a sort of spiritual realm. Her father could pass on some special jutsu knowledge or life lessons to her. And her mother might give her some warm hugs and tell her how much she was loved even before she was born. There could also be some interesting family dynamics explored, like how her parents would react to her being female in a world where Naruto was originally male.
Obviously, Natsu himself would be one of the main characters. His parents, whose identities are likely to be revealed in the fanfiction. There could also be his friends, like Lucy, Gray and Erza. They might be there to support Natsu during this emotional encounter or play a role in helping him find his parents.
Obviously, Spike is one of the main characters. His parents would be the other important characters. And depending on the plot, Twilight Sparkle or some of Spike's other friends in Ponyville might also be involved, perhaps as moral support for Spike during the meeting.
In this fanfiction, Kid Goku is a given. His parents are the central focus of the meeting. However, we could also see other Saiyan characters. Maybe some Saiyan elders who knew his parents well and can provide more context about Goku's family. Additionally, Master Roshi could be included. He has been an important figure in Goku's life, and his reaction to Goku meeting his parents could add an interesting dynamic to the story. There could also be villains who try to disrupt the reunion, adding some action and conflict to the fanfiction.
Obviously, Wade would be one of the main characters. And then there would be the parents of the Avengers. For example, Thor's father Odin (if he's still alive in the context of the fanfiction), or Tony Stark's father Howard Stark if he were to be involved in some sort of flashback or time - travel scenario.
Obviously, Batman himself would be one of the main characters. And of course, his parents, Thomas and Martha Wayne. There could also be Alfred, as he is an important figure in Batman's life and might play a role in facilitating the meeting or providing some insights afterwards.
Obviously, a female version of Naruto would be the main character. She would be at the center of the story, dealing with the consequences of the experimentation.
Obviously, Naruto and Jiraiya would be the main characters. Naruto, the protagonist of the original series, and Jiraiya, his mentor. They have a deep connection, and any fanfiction about them meeting would revolve around their relationship.
Obviously, Naruto would be one of the main characters. He's the central figure from the Naruto universe. And then there would be the Pokegirl. She could be any type of Pokegirl, like a Pikachu - girl or a Charmander - girl. Their different personalities and abilities would drive the story forward.
Obviously Naruto himself. And from the 'Death' side, the Shinigami is very likely to show up. It's the most iconic death - related character in that universe.