A mysterious outsider who suddenly appears in the world of the Northern Star could be the main character. This character has a hidden past and strange powers that are gradually revealed as the story progresses. Their presence shakes up the existing order and sets in motion a series of events related to the Northern Star.
A young inventor could be a main character. He is full of new ideas and is trying to make Star City a better place with his inventions.
A young and ambitious sand ninja named Kaito could be a great main character. He's eager to prove himself and rise through the ranks in Sunagakure. Another could be a female ninja, Saya, who has a special jutsu related to sand manipulation that sets her apart. Or perhaps an older, more experienced ninja, Ryuji, who has seen many battles and has a lot of wisdom to offer but is also haunted by his past actions in the service of the village.
Red could be a great main character. He's one of the most iconic Pokemon trainers. You could tell the story of his journey from a different perspective, like how he got his first Pokemon and what his real motivations were at the start of his adventure.
Tom, Star's ex - boyfriend, could also be an important character. His presence could create some tension in the story. He might still have feelings for Star and try to win her back, which would complicate Star's budding relationship with Marco. Additionally, characters like Janna could be added. Janna is known for her mischievous nature and she could play a role in either helping or hindering Star's relationship with Marco, perhaps by uncovering secrets or playing pranks that have an impact on their relationship.
Maybe a smuggler. Smugglers have always been an interesting part of the Star Wars universe. They often get caught up in bigger events and have their own set of skills and motives. So a new smuggler character could be a main character in the new story.
A young dreamer could be a main character. This person is always looking at the stars and has a big imagination. They are the one who first makes the wish upon a star and sets the story in motion.
It could be a young orphan. Orphans often struggle to find a place where they belong, so this character would have a strong motivation to search for that special place. They could be kind - hearted but also have a bit of a feisty side to survive in the world of the fanfic.
Jackie Estacado from 'the darkness' is an obvious choice. His connection to the Darkness power makes him a central figure and his skills and personality can drive the story forward in a crossover.
It could be the original main characters from the source material, just older and more experienced. For example, if it's a fanfic based on a teen drama, the once - young protagonists are now adults with more responsibilities.
A cunning spy could be a main character. They are always using artful maneuvers to gather intelligence and avoid getting caught. Their skills in deception and stealth would be central to the story.