In this fanfiction, Natsu is the key character as it's centered around his situation. Other than that, the guild master of Fairy Tail, Makarov, could be an important character. He might lead the search for Natsu or have some special knowledge about what happened to him. Also, Happy, Natsu's sidekick, would probably be in the story, either trying to find Natsu or having his own adventures while Natsu is lost.
Natsu would obviously be one of the main characters since it's about him being the lost Fairy Tail member. There might also be other Fairy Tail members like Lucy, Gray, or Erza who could be involved in the search for Natsu or play important roles in his journey back.
Most likely, Natsu is the central character. However, depending on the plot, there could be new characters introduced. For example, a character who helps Natsu while he's lost or an antagonist who is responsible for his being lost in the first place. And of course, the other Fairy Tail members who are an integral part of the Fairy Tail world and would surely be part of the story in some way.
It could be a dark wizard who has a grudge against Fairy Tail. This wizard might be the one who made Natsu lost in the first place, by using some devious magic to separate him from his guild.
The 'natsu the lost fairy tail member fanfiction' may revolve around Natsu being separated from Fairy Tail due to some unforeseen circumstances. It could be that a powerful enemy has trapped him in a mysterious place. The fanfiction would then detail his attempts to escape, his growth as a character during this isolation, and how his return to Fairy Tail would change both him and the guild.
The story could start with Natsu being tricked by a powerful enemy and sent to a far - off and unknown land. As a lost Fairy Tail member, he would have to rely on his instincts and the little magic he has left. He might meet new allies who help him in his journey back to Fairy Tail, all while learning important lessons about friendship and the true strength of his guild.
Seilah is also a main character in this context. She has her own set of powers and a rather complex personality in the Fairy Tail universe, which can be further explored in fanfiction.
Lucy could be a main character. She was always close to Natsu in the original Fairy Tail. So when Natsu returns as an 'ex' and meets the guild again, she would likely play a big role in how he is received and in the development of the story.
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.
Gray would also be important. There could be a rivalry - turned - friendship aspect where Gray, who has his own ice - making powers, and Natsu, as a dragon, have to learn to work together. Maybe they compete in a friendly way to see whose powers are more useful in different situations.
Lucy is often paired with Natsu in many fanfictions. Their relationship can be explored in different ways in these fan - created stories. It could be a more romantic relationship than in the original series, or they could have a different kind of partnership, like being more equal in power or having different goals they pursue together.
Lucy and Natsu are the central figures. Their relationship is at the core of this fanfiction. Lucy uses her wits and charm to tease Natsu, and Natsu responds with his typical fiery and passionate reactions. Their interactions are what drive the story forward, and any other characters that appear are there to either enhance or complicate their relationship dynamic.
The main characters are clearly Lucy and Natsu. Lucy is a celestial wizard in the Fairy Tail guild, known for her kind heart and determination. Natsu is a dragon slayer, hot - headed and powerful. In this fanfiction, their relationship is the focus, with Lucy taking the initiative to get closer to Natsu in a seductive way.