A possible plotline is a love triangle. Maybe another character has feelings for Evergreen and Elfman has to compete for her affection. This could create a lot of drama and tension in the fanfiction. For instance, the other character could be constantly trying to undermine Elfman in Evergreen's eyes.
One idea could be that Elfman and Evergreen are sent on a mission together alone. They start off bickering as usual, but as they face various challenges, they begin to understand each other better. For example, they have to work together to defeat a powerful dark mage. During this time, Elfman discovers Evergreen's insecurities behind her tough exterior, and Evergreen realizes that Elfman is not just a brute but has a kind heart.
In some fanfictions, they could participate in a guild - wide competition. While competing, they form an alliance and start to communicate more. They find out that they have a lot in common, like their love for the guild and their desire to become stronger. This shared ground could be the basis for their relationship to develop in the story.
They could start by having common goals. For instance, if the guild is in danger, they both contribute in their own ways and start to respect each other's abilities more. This mutual respect can be the foundation for a deeper relationship.
One possible plot could be that Elfman and Evergreen are assigned on a mission together in the Fairy Tail guild. At first, they bicker as they have different approaches. Elfman is more about brute strength and Evergreen is more tactical. But as the mission progresses, they start to see the value in each other's methods. They face a powerful dark mage, and in the heat of the battle, they realize their feelings for each other, leading to a new relationship within the guild.
Elfman's development could involve him becoming more confident in his non - physical abilities. With Evergreen's influence, he could explore his magical side more deeply. He might start to study different types of magic that Evergreen introduces him to. Evergreen could be developed to be more empathetic. As she gets closer to Elfman, she realizes that his simple view of the world has its own charm. She could start to be more involved in the guild's more physical activities, like helping with building repairs, which she would never have considered before.
One plotline could be centered around a prank in the Fairy Tail guild. A mischievous member uses magic to make all the cookies being made for a party burnt. This then sets off a chain of events where the guild has to figure out who did it and how to get revenge in a fun, light - hearted way. There could be lots of banter and friendly rivalries between the characters as they try to solve the mystery of the burnt cookies.
Another plot could involve Irene using her unique powers to help Fairy Tail in a big crisis. Maybe there's a powerful enemy threatening the guild and her abilities are crucial in the fight. For example, she could use her magic to turn the tide in a battle against a dark guild.
One possible plotline could be Naruto joining Fairy Tail and having to prove himself to the other members. He might start from the bottom and work his way up, showing his skills in battles against other guilds. Another plotline could be that Naruto discovers a connection between his ninja world and the magic of Fairy Tail, and he tries to figure out how to use this connection to his advantage.
One possible plotline could be Naruto getting transported to the Fairy Tail world and having his powers suppressed. He then has to learn Fairy Tail magic from scratch. Another could be that Naruto is cursed in the Fairy Tail world which makes him weak, and he has to find a way to break the curse while making friends in the guild.
One great Evergreen Fairy Tail fanfiction is 'The Unseen Magic of Evergreen'. It delves deep into Evergreen's backstory and her relationship with the other guild members in a very heartwarming way. It shows a side of her that we don't often see in the original series.