A simple plot could be that Meliodas and Merlin discover a hidden prophecy that only they can fulfill. They embark on a journey to find the key elements of the prophecy, facing various challenges along the way. Their relationship could grow stronger as they support each other through difficult battles and puzzles.
Perhaps in the fanfiction, there is a new and powerful enemy that is immune to the attacks of all the other sins except Meliodas and Merlin. They have to combine their powers in a way they never have before. As they work together to figure out how to defeat this enemy, they start to understand each other on a deeper level. They learn about each other's past traumas and fears, which not only helps them in the fight but also changes the nature of their relationship.
The fanfiction could be centered around Meliodas getting cursed and only Merlin's magic can break it. But in order to do so, she has to sacrifice some of her own power. This creates a conflict within her as she is torn between saving Meliodas and losing her power. Meanwhile, Meliodas tries to convince her not to sacrifice herself, leading to some heart - to - heart conversations between them.
One possible fanfiction could be about Meliodas and Merlin's adventures before they joined the Seven Deadly Sins. Maybe they were on a secret mission together, facing powerful enemies and having to rely on each other's unique abilities. Merlin's magic and Meliodas' strength would make for an interesting dynamic.
Another idea for the fanfiction could center around their relationship. Perhaps it explores how Merlin has always been intrigued by Escanor's duality - his meek self at night and his powerful self during the day. It could show how they gradually develop a deeper understanding and respect for each other, which might even turn into a romantic relationship over time.
In such fanfictions, Merlin is often portrayed as a very powerful sorceress. She has an air of mystery around her. Her magic is usually depicted as extremely potent and she uses it to protect Arthur or further their shared goals. She might be shown as a manipulator at times, using her intelligence and magic to influence events in their favor.
One great fanfiction is 'The Sun and the Sorceress'. It beautifully explores the relationship between Escanor and Merlin. It delves into how their different powers and personalities interact. The story has some really heart - warming moments where Escanor's pride is shown in a new light in relation to his feelings for Merlin.
One idea could be a crossover where Naruto's world is invaded by the forces of the Seven Deadly Sins and Merlin from that universe has to team up with Naruto to stop them. Naruto's powerful jutsu and Merlin's magic could create some really interesting battle scenes.
One great fanfiction could be titled 'The Unseen Bond'. In this story, Merlin and Escanor's relationship might be explored in a world where they have to overcome a new threat to the Seven Deadly Sins. It could show how Merlin's magic and Escanor's strength combine in unique ways. Maybe there's a scene where Escanor in his 'The One' form is protecting Merlin while she casts a powerful spell that could save them all.
A plot could be that Escanor and Merlin are tasked with training a new generation of knights. They have different teaching styles, with Escanor focusing on physical and mental fortitude, and Merlin on magical abilities. This leads to some humorous and also some tense moments as they try to work together.
One popular plot twist is Merlin's true origin. In some fanfictions, it is revealed that she has a much deeper connection to the world's magic or a certain ancient power than initially thought.
Merlin in the Seven Deadly Sins fanfiction often has a very complex character development. She starts off as a mysterious and powerful mage. Her actions are often driven by her own goals and the pursuit of knowledge. For example, she may manipulate situations to further her understanding of magic or the world around her.
One popular plotline is the struggle against their fated circumstances. Since Elizabeth is cursed to be reincarnated and Meliodas has his own dark past, they often face challenges related to their destinies. Another plotline could be their adventures together as they fight against the forces of evil in the world of Seven Deadly Sins. They might also have moments of emotional growth and realization of their deep love for each other, like when they overcome misunderstandings or external threats to their relationship.