Well, 'A Dark Natsu and Lucy Adventure' is a popular one. In this fanfiction, Natsu's dark side gets accidentally unleashed during a mission, and Lucy has to figure out how to deal with this new, more unpredictable Natsu. Then there's 'Darkness Within Natsu' where the story focuses on how Lucy tries to understand the source of Natsu's darkness and bring him back from the brink. 'The Dark Natsu - Lucy Alliance' is also quite good, as it shows them teaming up in a world filled with new and dark threats.
Well, aside from the well - known FanFiction.net and AO3, some niche anime - related forums might also have 'Dark Natsu and Lucy fanfiction'. However, these might not be as well - organized as the big platforms. Another option could be Wattpad, although it has a broader range of content, but you can still find some great 'Dark Natsu and Lucy' stories there if you search thoroughly.
They can develop their relationship by having small, everyday moments. For example, sharing breakfast together as a family, where they talk about their plans for the day. Natsu could show his love for Lucy by being more protective of her and their family in dangerous situations. Also, they could have inside jokes that only their family understands, which would strengthen their bond.
One character that would be interesting to include is Mirajane. She has a motherly and observant nature. She could be the one to nudge Natsu and Lucy in the right direction when it comes to their relationship. For instance, she might arrange for them to go on a mission together that she knows will bring them closer. Laxus could also be in the fanfiction. His powerful presence can create a sense of danger or protection. If there's an outside threat to the guild while Natsu and Lucy are exploring their relationship, Laxus could be at the forefront of defending the guild, which would impact Natsu and Lucy's situation. And don't forget about Cana. She could be the one to create some light - hearted chaos, like daring Natsu and Lucy to do something that ends up bringing them closer, such as a bet that leads to a shared adventure.
As they travel, their bond deepens. They start to rely on each other more. Natsu becomes more protective of Lucy, and Lucy begins to understand Natsu's impulsive nature better.
She might start to blush furiously. Given her character, she is a bit shy when it comes to romantic matters. And then she might start to stammer out a response, not really sure what to say at first. As she composes herself, she could tell Natsu that she has feelings for him too but in a very gentle and sincere way.
A popular one is 'Dragon's Love for the Celestial Mage'. This fanfiction takes their relationship to a new level. It starts with a simple adventure but soon unfolds into a story of deep love and loyalty. The author does a great job of portraying Natsu's dragon - like instincts when it comes to protecting Lucy, and Lucy's growing feelings for Natsu are also well - written.
Well, it depends on the specific fanfiction. There are thousands of fanfictions out there, and some might misinterpret or twist the characters' personalities. Natsu is generally seen as a passionate and sometimes hot - headed character in the original, not an abusive one. However, in certain fan - made stories that aim for a more 'dramatic' or 'dark' take, they could write him as being abusive to Lucy. But these are not in line with the general perception of the characters.
One possible scenario in this fanfiction could be that Natsu and Lucy start to realize their feelings during a particularly dangerous mission. They might have a moment of shared vulnerability, like when Natsu protects Lucy from a powerful enemy. Their secret glances and small gestures towards each other start to become more frequent, and they gradually become aware of their deepening connection.