One plot idea could be that Allen and Lenalee go on a special mission together in a new, uncharted area. They face strange akuma and have to rely on each other's unique abilities more than ever. For example, Allen's cursed eye and Lenalee's dark boots play crucial roles in fighting off the akuma hordes.
Another plot could be a story where Allen gets injured during a battle, and Lenalee has to take care of him. During this time, they have deep conversations about their pasts, their fears, and their hopes for the future. This could strengthen their bond and make their relationship more complex and interesting.
Fanfiction about Allen and Lenalee being pregnant can be a creative take on the D.Gray - man universe. Some fanfiction writers might explore the medical aspects, like how the pregnancy would affect Lenalee's Innocence. Others might focus on the emotional journey of Allen and Lenalee. They would need to face the challenges not only from the Akuma but also from the fact that they are about to become parents. It could be a story full of love, worry, and hope, which is quite different from the main plot of the original manga.
One great fanfiction could be where Lenalee and Allen are on a mission together in a mysterious, ancient castle. They face many challenges and in the process, their bond deepens as they rely on each other's skills.
One common theme is friendship. Allen and Lenalee's friendship is a central part of many fanfictions. Their loyalty to each other and how they support one another through difficult times is often explored.
A common theme is friendship. Their friendship is often explored more deeply, like how they support each other through tough times in the Order.
There might be. However, the quality can vary greatly. Some fanfictions might focus more on their relationship development leading up to the kiss, while others might just have it as a brief moment. It's best to look for ones with high ratings and reviews.
Perhaps a plotline could center around the Innocence within them reacting to the pregnancy. Maybe Lenalee's Innocence has some sort of special reaction, like providing an extra layer of protection. And Allen could have dreams or visions related to the future of their child, which could lead them on a new quest to understand what it all means in the context of the D.Gray - man world.
One interesting plot idea could be Allen and Kanda being forced to team up on a mission in a completely new and dangerous area. Maybe they have to deal with a powerful Akuma that has unique abilities they've never encountered before. This would force them to rely on each other's skills, with Allen's Innocence and Kanda's sword - fighting abilities working in tandem.
Maybe the Earl hides Allen in a parallel dimension where time moves differently. Allen has to find a way to get back to his own world while also dealing with the strange rules and creatures in this new dimension. The Earl's motives for doing this could be to keep Allen away from the Order and use his power for his own evil plans later.
Perhaps a story where Marian Cross is framed for a crime within the Order, and Allen is the only one who believes in his innocence. Allen then sets out to prove Marian's innocence, facing many obstacles and enemies within the Order. This could lead to a lot of action and also some deep emotional moments between them as they face this difficult situation together.
FanFiction.net is a great place to start. There are tons of D Gray - Man fanfictions there. Just search for the relevant tags and keywords.