There could be a mysterious old man who lives in a secluded forest. He has a special bond with a Pokemon that is both light and dark in nature. He gives cryptic advice to young trainers who pass by his forest, guiding them on their journey to understand the balance between light and darkness. And then there's a young girl who can communicate with Pokemon through dreams, especially those related to light and darkness.
One unique character could be a traveling minstrel who sings songs about the legends of Pokemon light and darkness. His songs have the power to soothe the Pokemon of darkness or enhance the powers of the Pokemon of light. He travels from town to town, spreading the tales and also looking for a long - lost Pokemon that is said to hold the key to unifying the two powers. His appearance is rather flamboyant, with a bright cloak and a lute made from a special Pokemon - related material.
A pokemon that is a hybrid of two different types, like a fire - and - ice - type pokemon. It would have a really unique personality, constantly in conflict between its two natures. It could be a central character trying to find its place in the pokemon world.
Obviously, Loki would be one of the main characters. He could be joined by Thor, his brother. Thor might represent the 'light' in contrast to Loki's more complex nature. Maybe they have to work together to combat the encroaching darkness. Another character could be Odin, who might have some knowledge or power that is crucial in dealing with this situation.
One idea could be a story where a new Pokemon is discovered that has the power to control light and darkness. Trainers from all over the region are vying to catch it, but it's extremely elusive. Another could be a Pokemon that has been corrupted by darkness and a young trainer's journey to purify it using the power of light.
I don't know for sure as I haven't read it. But it could be a protagonist who is struggling with some sort of inner turmoil or external conflict, and then there might be a secondary character who acts as the 'light'. For example, it could be a young wizard as the main character who is constantly battling his own dark magic tendencies, and then a wise old mentor could be the 'light' character.
I'm not sure as it depends on the specific fanfiction. It could be an original character created by the author who is trying to find their way out of a dark situation.
Since it's a Twilight fanfiction, it might focus on the Cullens as the main characters. One of them could be the one to bring the 'light in the darkness'. For instance, Carlisle with his moral compass and leadership could be the central figure in a story about guiding the family through a difficult time in the Twilight - like world. Or perhaps it could be a new Cullen - like vampire introduced in the fanfiction who plays this role.
It's hard to say exactly who the main characters are without reading the fanfiction. But if we consider the themes of 'darkness in the light', it could be characters who are on the verge of losing their way in the light - filled Yu - Gi - Oh world. It might be some of the minor characters from the original series who are given more depth in this fanfiction. For example, a character who was always in the background but now is in the center of a story arc dealing with the discovery of a dark power within a seemingly innocent card. Or it could be an entirely new character created by the fanfiction author who has a unique connection to both the light and the darkness in the Yu - Gi - Oh universe, and through their journey, we explore the concept of 'darkness in the light' more deeply.
The main character is usually a young Pokemon trainer who is eager to explore the world and become a Pokemon master. There are often friends or rivals that the main character meets along the journey.
In this fanfiction, aside from the core RWBY team, there could also be other important characters. Ozpin might play a role as he often has knowledge and guidance to offer. Qrow Branwen could also be involved as he is Ruby's uncle and has his own set of skills and connections. Additionally, characters like Pyrrha Nikos might make an appearance if the story is set in a timeline where she still exists, and she could be a powerful ally in the battle against the darkness.
Often, the main protagonist who is on a quest to bring light is very popular. They are the ones readers root for. Also, any mysterious mentor - like characters who guide the protagonist on their journey tend to be well - liked. And the antagonists that are complex and not just pure evil can gain a lot of fans as well.