Well, it could start with a simple act of kindness. Maybe Lucy is feeling down one day, and Mira is there to comfort her. From there, they start spending more time together, like going on small adventures in the nearby forest. As they face small challenges together, like getting lost or encountering a minor magical creature, they start to trust each other more. Then, when a bigger threat comes to the guild, they are already so close that they are able to fight side - by - side without hesitation, and their relationship deepens even further as they realize how much they mean to each other.
Their relationship could develop through shared secrets. For example, they might discover something about the guild's past that they decide to keep between themselves. This would create a special bond.
To develop their relationship, start with small interactions. Have the OC offer to help Lucy with her celestial spirit summoning, like finding a rare ingredient for a spirit - summoning spell. Then, they could have some shared experiences, such as getting trapped in a cave during a mission. This forces them to rely on each other, talk, and get to know one another better. Another way is to give them common goals. For example, they both want to defeat a certain dark mage who has been causing trouble in the area. Working towards this goal together will bring them closer.
In a fanfiction, their relationship might develop if they start to open up more about their pasts. Lucy could share more about her family and how she came to be a celestial wizard. Natsu could talk about his search for Igneel. By sharing these deep parts of themselves, they would build a stronger emotional connection. Also, small moments like Natsu saving Lucy from a small danger, like a falling object in the guild hall, can add up and gradually develop their relationship.
In a fanfiction, their relationship might develop because of a mutual friend. Maybe a character from Fairy Tail is in danger and they both care about that person. So they work together to rescue the friend. During this rescue mission, they see different sides of each other. Angel might see Lucy's determination and kindness, and Lucy might see Angel's hidden strengths and softer side. This new understanding can lead to a closer relationship between them.
Often, their relationship develops through shared experiences. Maybe they get stuck in a magical realm together. There, they have to work together to find a way out. In this process, they might have arguments at first because of their different ways of doing things. Erza is more of a strict and by - the - book type, while Lucy is more spontaneous. But as they face difficulties, they learn to compromise and grow closer. In some fanfictions, this eventually leads to a very strong friendship where they are almost like family to each other.
One way their relationship could develop is through a mutual understanding of their powers. If they start training together to combine their celestial magic in new ways, they'll have to communicate and rely on each other more. This would not only strengthen their magical bond but also their personal relationship. Another aspect could be that they face a situation where they have to make sacrifices for each other. Say, Lucy has to give up a chance at a powerful magical item to save Loke, or Loke has to put himself in great danger to protect Lucy's family. These kinds of selfless acts would take their relationship to a new level.
Their relationship could start as a simple acquaintance when they are assigned to the same mission. Then, as they face difficulties together, they gradually become friends. For example, Dan might save Lucy from a dangerous attack, and Lucy in turn helps Dan understand the workings of the Fairy Tail guild better.
Their relationship could develop through shared experiences. For instance, if they both get caught in a magical trap that only they can escape from by working together. They would have to rely on each other's skills, and this could lead to a newfound respect. Jackal might see Lucy's intelligence in figuring out the magic of the trap, and Lucy could see Jackal's tenacity.
They might also develop it through small, everyday interactions. Like Gray bringing Lucy her favorite drink when she's feeling down, or Lucy helping Gray pick out a new shirt. These simple acts can slowly build up their relationship over time. In many fanfictions, the characters' personal growth also plays a part. As Gray becomes more in touch with his emotions and Lucy becomes more confident, they are more likely to recognize and act on their feelings for each other. It's a gradual process that makes the relationship seem more real and believable.
In many fanfictions, Wendy and Lucy's relationship is developed when they help each other with their magical training. Wendy might teach Lucy about some of her unique dragon - slayer magic techniques, and Lucy could share her celestial spirit knowledge with Wendy. As they learn from each other, they become closer. Also, there could be situations where they protect each other from the judgment or jealousy of other guild members, which cements their relationship further.
A common way is to create external conflicts that bring them closer. Maybe the guild is facing a big enemy and Laxus and Lucy have to combine their powers. During this process, they start to trust each other more. Writers also like to include some internal conflicts within the characters. For Laxus, it could be his past issues with trust, and for Lucy, it might be her insecurities. As they overcome these together, their relationship deepens. And sometimes, they'll just have simple, everyday interactions that slowly but surely turn into something more romantic, like sharing a meal or a walk in the guild hall.