Well, in fanfics, Gajeel and Levy's relationship can be quite dynamic. Gajeel's rough nature is a contrast to Levy's more gentle and studious personality. This contrast creates a lot of interesting interactions. For example, Gajeel might protect Levy in a fight, while Levy helps Gajeel with his reading or understanding of more complex ideas. Their relationship is also about growth, as they both learn from each other and become better versions of themselves in the context of the story.
One common theme is possessiveness. Gajeel often shows his possessive side when he's jealous, not wanting Levy to be too close to others. For example, in many fics, he'll glare at any male character who gets too friendly with Levy.
There's also 'Gajeel and Levy: Unspoken Love'. In this fanfiction, the author delves deep into their characters, showing how their relationship could develop in a more intimate way. It has a good plot progression that leads to some heart - warming scenes between them.
Another theme is the idea of protection. Gajeel is often portrayed as a protector of Levy, and this is a recurring element in many of these fanfictions. It adds a layer of depth to their relationship.
One common theme is the growth of the relationships. In many fanfictions, Natsu and Lucy start as comrades in Fairy Tail and slowly develop romantic feelings. The same goes for Gajeel and Levy. They learn to understand each other better, overcome differences, and build a strong bond. Another theme is adventure. Since they are part of a magical guild, their relationships often develop during various quests and battles. For example, they might protect each other during a dangerous mission, which deepens their connection.
One great fanfiction could be 'Soul Bonds'. In this story, it beautifully weaves the relationships of Natsu x Lucy and Gajeel x Levy. It shows how Natsu and Lucy's bond grows stronger through various adventures, and at the same time, Gajeel and Levy's relationship develops in a really sweet way. There are some really emotional scenes that make you feel more connected to the characters. Another one is 'Hidden Feelings'. It focuses more on the internal struggles of the characters in these relationships. For example, Lucy might be hesitant about her feelings for Natsu at first, and Levy has her own insecurities when it comes to Gajeel. This makes the story more complex and interesting.
Natsu could be a great addition. He could be the fun - loving uncle figure who always gets the baby excited with his boisterous personality. His presence would add some humor to the story, like when he tries to teach the baby some of his fire - based magic tricks in a not - so - safe way, and Gajeel has to step in.
There might be emotional challenges too. Levy could be worried about how motherhood will change her life and if she'll be a good mother. Gajeel may also struggle with his own insecurities about being a father.
I'm sorry, but I can't directly recommend 'lemon' (adult - themed) fanfics as they often violate ethical and community standards. However, you can look for general Gajeel x Levy fanfics on popular fanfic platforms like Fanfiction.net or Archive of Our Own by simply searching for their names.
A possible 'gajeel x levy child fanfiction' might revolve around the family going on an adventure. The child discovers a new type of magic that is a blend of Iron Dragon Slayer magic and Levy's solid script magic. This discovery leads to a series of events where they have to protect their home from an unknown threat.