The two main characters are Ryuk and Light. Ryuk is a Shinigami, a death god from the Shinigami realm. He drops the Death Note into the human world which Light Yagami finds. Light is a brilliant high - school student who becomes obsessed with using the Death Note to create a world free of crime by killing criminals.
Well, obviously Ryuk and Light. Ryuk is this otherworldly, somewhat apathetic being who is intrigued by human behavior. Light, on the other hand, is a complex character. He starts out with good intentions of cleansing the world but gradually gets consumed by the power of the Death Note. In the fanfiction, their interactions are central to the story, with Ryuk often acting as a sort of catalyst for Light's actions.
Ryuk and Light are the main ones. Ryuk has his own motives which are often mysterious. He gives Light the power of the Death Note and then watches as Light embarks on his journey. Light, being the main human protagonist, his character development, his struggle with power, morality, and his relationship with Ryuk form the core of the fanfiction.
Another interesting plot might be Ryuk trying to save Light from his own downfall. As Light gets deeper into his plans and faces more challenges, Ryuk, who has a unique understanding of the situation, could attempt to guide Light in a different direction to avoid his ultimate demise.
Common themes in Ryuk x Rem fanfiction include the discovery of new emotions. Since they are not exactly the emotional type in the original story, fanfiction writers like to explore how they would react to falling in love or developing a deep bond. Also, the theme of survival can come up. If they get involved in a situation where their lives as Shinigami are at risk, how they support each other through it can be a central theme in the stories.
The main characters include Celty, a Dullahan on a search for her head. There's also Mikado, a high - school student who gets drawn into the strange events in Ikebukuro. Anri is another important character, with her own secrets. And Izaya, who likes to stir up trouble in the city.
Megaman X is the central figure in the light novel. He is the hero who goes on various missions. Zero, his ally, is also a very important character. He often teams up with X to fight against the bad guys. And then there's Dr. Cain. He is related to the creation or discovery of Megaman X and his story might be intertwined with X's journey.
Character development. In ryuk x oc fanfiction, both Ryuk and the OC can grow in ways that are unique to their relationship. The OC might bring out different sides of Ryuk, like a more empathetic side perhaps. And Ryuk can also influence the OC, maybe making them more cynical or more aware of the afterlife concepts. This back - and - forth development is really engaging.
I'm not entirely sure without reading it thoroughly, but I bet there are some standout servant characters who play important roles.
In the 'Spy x Family' light novel, the central characters are Twilight, who is a very competent spy. Then there's Anya, a little girl with the special ability of telepathy. Her presence brings a lot of unexpected twists. And Yor, who becomes Twilight's wife in this made - up family. Yor has her own secrets and her character adds depth to the story.
There could also be a villain in the fanfiction. Maybe an evil sorcerer or a dark dragon that opposes the dragon of light. This villain would add conflict to the story and drive the plot forward as the dragon of light has to fight against their dark plans.
Probably the champion of the light is the central character. There could also be sidekicks or allies that help the champion in their quest to uphold the light. Maybe there are antagonists too, like villains who represent the dark side and try to stop the champion.
I'm not entirely sure as I haven't read this specific fanfiction in detail. But usually, it might include the main characters from the original work it's based on, perhaps with some new characters added in to drive the new story forward.