One possible scenario could be that Allen is forced into a situation where he has no other choice but to become a Noah. Maybe he is tricked by a powerful Noah who manipulates his past traumas and the power of Innocence within him. The dark side of the Noah's power might seem appealing in some way, like offering him a way to end his constant struggle against the Akuma and the Earl.
One common theme is his struggle with his identity. Since he has this complex connection to the Noah, many fanfics explore how he deals with that part of himself.
Another option is FanFiction.net. It has a large collection of fan - created stories. However, the quality can vary, so you might need to read through a few to find the really good Noah Allen - related D Gray - Man fanfics. Look for ones with high ratings and a lot of reviews.
In some fanfics, Allen might be depicted as dead, but it really depends on the specific plot and the author's creativity. Fanfic writers often take liberties with the original story, so there could be various interpretations.
The story could explore the origin of the Noah and how Allen's connection to them is deeper than anyone thought. Maybe his family has some hidden ties to the Noah. This discovery could be the catalyst for his transformation. As he becomes a Noah, he might start to uncover secrets about the war between the Exorcists and the Noah that were previously unknown. This could lead to a re - evaluation of the entire conflict in the D Gray - Man universe.
One great D Gray - Man Noah Family fanfic is 'The Noah's Redemption'. It offers a unique take on the Noah family members, exploring their backstories more in - depth. It gives a different perspective on their actions and motives within the D Gray - Man universe.
Many D Gray - Man Noah Lavi fanfics also touch on the theme of sacrifice. Given the dangerous nature of the world in D Gray - Man, Lavi may be put in situations where he has to sacrifice something - it could be his own safety, his relationships, or even parts of his identity. Writers like to explore how he copes with these difficult choices and what the consequences are for him and those around him.
In this brainwashed Allen fanfic, it could also be that the brainwashing is part of a larger scheme. The Millennium Earl might be trying to use Allen as a weapon against the Black Order. Since Allen has the Innocence and his special powers, if he's under the Earl's control, he could cause a great deal of damage. The fanfic could then detail the battles that occur as a result, with the Black Order having to fight Allen while also trying to save him. They might have to find some long - lost knowledge or a special item to reverse the brainwashing process.
There are some fanfics that focus on Allen Earl's growth in power. They might describe his training sessions in more detail, and how he overcomes his weaknesses. Maybe he discovers a new form of Innocence or a unique way to use his existing powers. These fanfics often add exciting new elements to his character development.
Isolation is also a theme. Allen is often alone in his struggles, being the host of the 14th Noah. Fanfics may depict his feelings of isolation from both the Exorcist side and the Noah side, and how he copes with being different from everyone else.