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.
Natsu is the central figure for sure. His parents are the key characters he's going to meet. But there could also be some side characters from his guild. For example, the guild master might have some information about Natsu's parents and be involved in the meeting somehow. And maybe some of the older members of the guild who knew Natsu's parents in the past.
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, 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, 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.
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.
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, Natsu would be one of the main characters. And from the Seven Deadly Sins, Meliodas is very likely to be a main character as well since he's the leader.
In the 'natsu meets his parents fanfiction', Natsu may initially be in shock when he meets them. His parents could look exactly like him or have some unique features. They might take him on a journey to a place that was important to their family. Along the way, Natsu could learn valuable lessons about family, love and self - discovery.
There could be some new dragon characters created specifically for this fanfiction. These dragons might have unique abilities and characteristics that are different from the known dragons in the original Fairy Tail series. And perhaps there are some wise old wizards or spirits in the fanfiction who guide Natsu in between his dragon - training sessions.
Gray would be one of the main characters to interact with Natsu. Their friendly rivalry is well - known in Fairy Tail. Makarov, as the guild master, would also have an important role in interacting with Natsu. He might give Natsu some important tasks or just have a grandfatherly chat with him about his return.
The main characters are obviously Nashi and Natsu. Nashi is likely a new and interesting character, while Natsu is a well - known and powerful wizard from the original series.