When writing a D Gray - Man Noah and abused child fanfiction, don't be afraid to deviate from the original canon a bit. Since it's fanfiction, you can explore new ideas. However, stay true to the essence of the D Gray - Man Noah concept. For the relationship between the child and the Noah, build it gradually. Maybe start with the Noah being cold and calculating towards the child, but as they learn more about the child's past and suffering, they warm up. You can also add other elements from the D Gray - Man universe, such as the Black Order or other supernatural beings, to make the story more complex and engaging.
First, you need to research the D Gray - Man Noah universe thoroughly. Know the characteristics, powers, and motives of the Noah characters. Then, when creating the abused child character, give them a believable backstory and personality. For the plot, think about how the two elements will interact. Will the Noah be the savior of the child? Or will there be a more complex relationship? You can start with a simple outline, like the introduction of the child's situation, the encounter with the Noah, and how their relationship develops over time.
Another approach is to have a story where the abused child has a connection to the D Gray - Man Noah world without realizing it at first. For example, the child could be a descendant of someone important in the D Gray - Man lore. The Noah, sensing this connection, try to use the child for their own purposes, but as they interact more, they start to feel empathy for the child's situation and have a change of heart. This would explore themes of redemption and the power of human - Noah relationships.
First, study the characters from the D.Gray - Man series. Understand the nature of the Noah and the significance of the Mother figure. Then, come up with a unique plot. For example, you could set it in an alternate universe where their relationship is different from the canon.
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.
The Millennium Earl is an iconic character in the D Gray - Man universe. Writing about him in relation to the Noah family can be really engaging. His grand plans and his control over the Noah family can be delved into deeply. And, Jasdevi, the combined form of two Noahs, is also a character that stands out. Their unique relationship and their combined power make for some interesting fanfiction concepts.
One common theme is the origin of the Noah and their connection to the Mother. Many fanfictions explore how the Noah came to be and what role the Mother played in their creation. Another theme is power. The Noah Mother is often depicted as a very powerful entity, and fanfictions may explore how this power is passed down to the Noah or how it affects the world around them.
One idea could be exploring the origin of their relationship. Maybe the Noah has a unique connection to the Mother figure that predates the events of the main story. This could involve flashbacks and revelations about their past interactions.
First, study the existing Noahs in D Gray - Man. Notice their characteristics, powers, and personalities. Then, for your OC, give them a distinct power that still fits within the world's rules. For example, if all Noahs have some form of elemental control, your OC could have control over something like shadow or light.
A recurring theme is the power dynamics. The Noahs are powerful entities in the D Gray - Man universe. So, how the reader, who is usually a normal human or has some special ability, copes with the power of the Noahs is often explored. It could be about the reader fearing the power, trying to gain power equal to the Noahs, or using the Noahs' power for their own good. There is also the theme of acceptance. Whether the reader accepts the Noahs for who they are or tries to change them is something that many fanfictions focus on.
There is a fanfiction called 'Noah's Maternal Mystery'. In this story, the author tries to solve the many mysteries surrounding the Noah Mother. It has a great plot that keeps you guessing. Also, 'In Search of the Mother' is a fanfic that follows the characters as they attempt to discover more about the Noah Mother, with lots of action and intrigue along the way.
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.