One interesting 'critical point d gray man fanfic' could be one that focuses on the backstories of the minor characters in the original series. For example, exploring how some of the lower - ranked exorcists came to join the Order. It gives a new perspective on the world of D Gray - Man.
Another place to check is FanFiction.net. There are a lot of D Gray - Man fanfics there as well. However, the quality can vary more compared to AO3. You might need to sift through some to find the really good 'critical point d gray man fanfic' you're looking for.
One interesting 'D Gray - Man Fanfic' story could be about the characters' backstories that were not fully explored in the original. For example, a fanfic might delve deeper into Allen Walker's life before he joined the Black Order. Another could be a what - if scenario, like what if certain characters had different powers. There are also fanfics that focus on the relationships between the characters, such as the friendship between Kanda and Allen, and develop it in unique ways.
You could also create a fanfic where the reincarnation process is not perfect. The characters may come back with some of their powers missing or distorted. This could lead to a lot of internal conflict as they struggle to adapt to their new, less - than - perfect selves while also facing the external threats that come with the D Gray - Man universe. They might have to find new ways to fight against the Akuma and the Millennium Earl without relying on their full set of original abilities.
One idea could be that a character is brainwashed by the Millennium Earl to turn against the Black Order. For example, Allen could be made to believe that the Order is the real enemy, leading to some intense battles and internal conflicts within the group.
One interesting D Gray - Man OC fanfiction could be about an OC with a unique Innocence power that changes the dynamics of the Black Order. For example, an OC whose Innocence can heal not just physical wounds but also mental traumas of the Exorcists, which would add a new layer to the story's conflicts and relationships.
One idea could be the exorcists having to deal with Akuma during a Halloween - themed mission. Maybe the Akuma are disguised as typical Halloween creatures like vampires or werewolves, adding an extra layer of confusion. Another plot could involve Allen Walker stumbling upon a town where a dark magic related to Halloween is causing chaos, and he has to figure out how to stop it while also dealing with his own inner demons.
The creativity in the scenarios is a big part. Maybe it's set in a situation where Kanda is caught off - guard and his reaction to being tickled is both funny and endearing. Also, the way the author describes the tickling itself, like the sensations and Kanda's responses, can add a lot of charm to the fanfic. It gives a different perspective on the characters and their interactions.
Another aspect could be the relationship between some of the exorcists. They share a common goal, and in that journey, there are underlying feelings of love and camaraderie. They are like a family, and the love within this family - like bond is also an important part of the story. It's not always the romantic kind of love but a strong emotional connection.
One interesting fanfiction could be about Alexander and Anderson teaming up to face a new, powerful Akuma. In this story, they might have to put aside their differences and combine their unique skills to defeat the common enemy.
One interesting concept could be the exploration of Mana's hidden powers. In the fanfic, perhaps his powers are shown in a new light, like being able to manipulate a different type of dark matter.