There could be a best friend of Gray who starts to suspect that Gray is not what she seems. This friend could play a crucial role in helping Gray either keep her secret or come to terms with revealing it.
Well, it could be that Gray has been hiding her true female identity all along. Maybe she's in a world where being a girl is not accepted in a certain context, like in a male - dominated sport or a strict military - like organization. And the fanfiction could revolve around her struggles to keep her secret while also trying to fit in and pursue her dreams.
Well, obviously, the two Grays are the main characters. One is Gray from the regular world we know, and the other is Gray from Edolas. Their encounter and the events that unfold around it are likely to be the central focus of the fanfiction.
In '50 Shades of Gray', the key characters are Anastasia Steele, who is an inexperienced young woman, and Christian Grey. Christian is a very wealthy and powerful man. Their relationship forms the core of the story. Anastasia is constantly learning about Christian's world, which includes his kinky side, and they both go through a lot of emotional and sexual exploration together.
The main characters are Gray and Juvia. Gray is often depicted as a cool - headed and powerful mage, while Juvia is a loving and somewhat obsessive (in a cute way) character when it comes to Gray.
I'm not sure specifically as there could be many novels with 'Shades of Gray' in the title. But generally, it might have a protagonist who is caught in a morally ambiguous situation. This character could be a young person trying to find their way in a world that doesn't have clear - cut rules.
The main characters are Anastasia Steele and Christian Grey.
The main character is the Gray Man, of course. He's the central figure around which the whole story revolves. And there are other CIA agents who are either chasing him or have some connection to his past in the agency.
There could be other characters in 'gray man stories' too. Maybe there are people who encounter the Gray Man. They could be local villagers or travelers. These characters play a role in the stories as they react to the presence of the Gray Man, and their experiences add to the overall plot.
The families that hire Agnes are also significant characters. Their different attitudes, behaviors, and social standings contribute to the overall plot as Agnes has to adapt to their households and expectations.
I don't know as I haven't read it. It could be a group of misfits who are trying to find their place in a world full of gray areas.