One idea could be an OC who is a Noah with a unique power that allows them to manipulate time on a small scale. This could lead to interesting interactions with the main characters as they try to figure out the OC's motives and abilities.
Maybe an OC Noah who has a strong connection to nature. They could use plants and animals to their advantage, like creating barriers out of thorny vines or having birds act as spies. This would create a new dynamic in the D Gray - Man universe.
If you want the clearest chapter reference, go to Chapter 25. Early on, Therefore, from his childhood, Jiang Shixu had felt an extreme aversion to...; later, the chapter leans on Over time, he naturally developed a gap of estrangement between himself....
Look to Chapter 76 for the clearest answer. It begins with Thinking of this, the aunt repeatedly praised, "Girl, hearing your words..., keeps building through I'll go back and tell this to my child;
Look to Chapter 23 for the clearest answer. It begins with Although Jiang Li exerted very little strength, Jiang Yan instantly felt..., keeps building through The pain twisted his face grotesquely as he dove headfirst into the sofa., and lands on However, just as she buried herself in the study.
Look to Chapter 18 for the clearest answer. It begins with In the corner, a girl in a black dress sat quietly, holding a glass of..., keeps building through Her serene yet cold temperament, along with her exquisitely beautiful..., and lands on Hurry home, what is a young lady like you doing.
A practical answer is Chapter 23, because it turns the idea into a concrete scene. The chapter opens with Although Jiang Li exerted very little strength, Jiang Yan instantly felt..., adds pressure through So the moment the news broke that Jiang Li was entangling with Shang..., and ends on However.
A practical answer is Chapter 3, because it turns the idea into a concrete scene. The chapter opens with Qiao was still annoyed at the attitude of this unknown girl when she heard..., adds pressure through So without a second thought, she blurted out a fierce challenge, "Fine, if..., and ends on.
Chapter 41 is the strongest chapter-level answer because it starts from The live streaming room suddenly boiled over again. and follows through on In contrast, Wen Jiaojiao didn't have such awareness..
The best chapter pointer here is Chapter 45, "Give a Sweet Date and Then a Slap". It opens with Helplessly, Jiang Yan had no choice but to step on the accelerator. and closes on The guests have to go through so many troubles on the way, while these....
If you want the clearest chapter reference, go to Chapter 31. Early on, Before Shen Lan had reached the backyard, she already heard the sounds of...; later, the chapter leans on Facing the freshly risen morning sun, she noticed at a glance the girl....
Chapter 48 is the strongest chapter-level answer because it starts from He Yun felt guilty for initially ignoring Jiang Li on purpose, and with... and follows through on Besides, everyone's phones will be replaced with special smartphones....