Since I haven't read the fanfic, I can only guess. Obviously, Professor Oak would be one of the main characters as the title implies. There might be a young trainer who has a connection to either blue or green Pokémon (maybe they specialize in water or grass types) and is the one who has to decide whether to forgive Prof Oak.
In the 'Blue or Green Forgive Prof Oak' fanfic, the main characters would surely include Professor Oak. Then, there might be a trainer who is very close to Oak, perhaps a former assistant or a protégé. This person could be associated with the blue or green elements, like they might have a special bond with blue or green Pokémon. There could also be other characters from the Pokémon world, such as rival trainers who also have an opinion on whether Oak should be forgiven. And of course, some of the iconic Pokémon from the blue or green categories, like Vaporeon (blue) or Venusaur (green), could play important roles in the story, either influencing the characters' decisions or being part of the events that led to the need for forgiveness.
The title 'Blue or Blue Forgive Prof Oak' clearly points to Blue and Professor Oak as main characters. Blue could be a young and ambitious character, perhaps a trainer. Professor Oak, on the other hand, is an older, wiser figure. In the fanfic, their relationship is likely to be at the core. There may be side characters that support or oppose their actions, but Blue and Oak are the ones that the plot will mostly revolve around.
The 'Blue or Green Forgive Prof Oak' fanfic could have a really interesting plot. Blue and green could stand for different Pokémon teams or regions. Prof Oak might have had some sort of betrayal or error that affected these regions or teams. The act of forgiveness could be a long and drawn - out process. The fanfic could explore the emotional journey of the characters involved, how they come to terms with what Prof Oak did, and how the blue or green aspects play into the overall theme of forgiveness, like perhaps certain Pokémon from those color - related aspects help in the process of forgiveness.
In a Prof Oak fanfic, the mention of blue or green Spearow could be really interesting. Maybe the color difference represents some special abilities or origins. For example, a blue Spearow might be a rare mutant form with enhanced flying speed compared to the regular ones. And a green Spearow could potentially have a closer connection to nature, like being better at finding hidden berries in the forest. However, without reading the specific fanfic, it's hard to say for sure what the significance of these colored Spearow is.
I'm not entirely sure about the specific plot of this 'Blue or Blue Forgive Prof Oak' fanfic as there could be many interpretations. It might involve a character named Blue having some sort of conflict or relationship with Professor Oak and then having to make a choice about forgiveness. But without reading the actual fanfic, it's hard to be more precise.
Obviously, Prof Oak would be one of the main characters. And perhaps a young trainer who is helping Prof Oak in his research related to the blue 39 thing. It could be a trainer who has a special bond with a certain type of Pokemon that is somehow related to the mystery.
It could be a young trainer. This trainer might be on a journey to discover more about Professor Oak and the significance of the blue or green stole. They might be new to the world of Pokemon and their encounter with the stole and Professor Oak sets them on an adventure.
In a Prof Oak fanfic, a blue or green Spearow could be a symbol of change. The normal Spearow is brownish - red. So the different colors could mean that something in the Pokémon world of the fanfic is changing. It could be an environmental change, like a new type of energy source in the area that is affecting the Spearow's appearance. It could also be a sign of a new era in the Pokémon training world where different - colored Pokémon are starting to emerge with new abilities.
The plot could center around a mysterious phenomenon that is either blue or green in color. Prof Oak, being the knowledgeable character, gets involved in investigating it. It might be something that is affecting the Pokémon world. For example, it could be a new type of energy that is either blue or green, and Prof Oak has to figure out how it works and whether it's beneficial or harmful.
The fanfic could be centered around a mystery where the blue or green stole is a key element. Professor Oak might be involved in the mystery, either as a guide or as someone who is also searching for answers. The stole could have been stolen from him, or he could be trying to protect it. The color of the stole, whether blue or green, could hold the key to unlocking the mystery, like blue could be related to a water - based clue or green to a forest - related one in the context of the Pokemon world that Professor Oak is from.
Prof Oak could interact with trainers who are associated with either the blue or green side. For example, a trainer who specializes in water - type Pokémon (blue) might come to Prof Oak for advice on a new blue - colored Pokémon they discovered. Or a trainer with grass - type Pokémon (green) could be in conflict with the blue - side trainers, and Prof Oak has to mediate.