In fanfiction, Natsu and Mavis could be like a mentor - mentee relationship. Mavis being the first master of Fairy Tail has a lot of knowledge and wisdom. Natsu could look up to her and she could guide him in his journey, much like how Makarov guided him in the main story.
There could also be a scenario where Natsu is seen as a sort of protector of Mavis's legacy. Since Mavis founded Fairy Tail, Natsu, who is one of the most powerful members, might feel a strong sense of duty to uphold what she started. He could go on quests specifically related to protecting the history and values that Mavis instilled in the guild.
Well, in many fanfictions, their relationship might start with Natsu being a bit in awe of Mavis as she is a very important figure in Fairy Tail's history. Natsu, being his brash self, might initially make mistakes around her but gradually learns from her wisdom. As time goes on, he could come to respect her even more deeply and they might form a bond where Mavis becomes like a guiding light for Natsu in his adventures and growth within the Fairy Tail guild.
One possible plot could be that there is some sort of misunderstanding or dark magic at play that causes Natsu and Mavis to fight. Natsu, being hot - headed, jumps into the fray without fully understanding the situation. Mavis, on the other hand, is trying to figure out a way to stop the fight without harming Natsu. As the battle progresses, they both start to realize that they are being manipulated and then team up to face the real enemy.
In some fanfictions, Natsu's dragon slayer magic and Mavis's Fairy Law could be combined in a unique way. For example, Natsu could use his fire to enhance the power of Mavis's Fairy Law, making it more destructive against their enemies.
One unique plot point could be Natsu having to learn magic in a completely different way under Mavis' tutelage. Instead of his usual hands - on, instinctive approach, he has to study theory and history. Another could be Mavis using Natsu to revive some long - lost traditions of the Fairy Tail guild. Maybe Natsu discovers a hidden power within himself that was dormant until Mavis guided him.
In a fight between Natsu and Mavis in a fanfiction, it's really hard to say who would win. Natsu is extremely powerful with his dragon slayer magic, being able to take on some really tough foes. However, Mavis is the first master of Fairy Tail and has a great deal of wisdom and powerful magic herself. It could really go either way depending on how the fanfiction writer wants to portray the battle.
In fanfiction, the relationship between Mavis and Zeref can be complex. Some fanfictions might explore their connection in a more romantic light, delving into how their different natures, one being the powerful wizard and the other with his own dark powers, interact. It could be a story of star - crossed lovers, with their fates intertwined due to the overarching plot of Fairy Tail.
In some Fairy Tail fanfictions, Natsu and Wendy might be depicted in a romantic relationship. However, this isn't a common or canon relationship in the original Fairy Tail series. Fanfiction writers often explore different pairings for creative and imaginative purposes.
The fight is full of surprises and plot twists. Both characters give it their all, and the outcome keeps you on the edge of your seat. There are moments of both strength and vulnerability from both Natsu and Mavis.
In fanfiction, Natsu and Mirajane's relationship can be really interesting. Some fanfics might start with their initial interactions in the guild. Natsu is often shown as his energetic self, and Mirajane, with her kind yet mysterious side. Their relationship could develop gradually as they go on adventures together in the fan - created stories. Maybe Natsu helps Mirajane overcome some past traumas she has, like her issues related to her demon side. And in return, Mirajane could offer Natsu more emotional support than he's used to, since he usually just focuses on fighting and protecting the guild.
In fanfiction, the idea of Mavis and Zeref having a child often leads to very complex and interesting storylines. Some fanfictions might explore the child's powers, which could be a combination of Mavis's magic and Zeref's unique abilities. For example, the child could have an extraordinary control over life and death magic, or possess some form of enhanced intelligence due to their parents' natures.