Imagine a character who is a bounty hunter with a unique code of ethics. Instead of just being after the highest price, they are more interested in justice. They could get involved in the conflict between the Resistance and the First Order, sometimes helping one side and sometimes the other depending on who they believe is in the right at the moment.
One of the interesting original characters could be a Jedi exile who has a unique fighting style that combines both traditional and lost Jedi arts. This character might have been in hiding for years, adding an air of mystery.
A character called Nova is really interesting. She's a mechanic on a remote planet who discovers an ancient Jedi relic. This sets her on a journey across the galaxy. She's really smart and resourceful. And there's Kael, a former Imperial officer who defects and becomes a key informant for the Rebellion. His knowledge of Imperial strategies makes him a valuable asset in many fan - made stories.
A sentient droid that has its own unique understanding of the Force. It could be a droid that was created by an ancient Jedi or Sith as an experiment. This droid would have abilities that no other droid has, like being able to sense Force users from a distance or even manipulate the Force in a small way.
Commander Bly. He doesn't get as much spotlight as some other clone commanders, but he has a lot of potential. His relationship with Aayla Secura could be explored more in fan fiction. Another is Barriss Offee. Before her fall, she had a lot of untapped storylines. And then there's Tiplee. She was a strong female clone commander who could be the center of some great fan - made stories.
First, give them a strong backstory. For example, if they're a bounty hunter, explain what led them to this profession. Maybe they had a rough childhood on a crime - ridden planet. Second, give them unique physical features or abilities. A character with the ability to camouflage like a chameleon in different environments would be cool. Third, create interesting relationships. If they have a rivalry with an existing Star Wars character, it adds depth.
A new character could be a super - smart girl who always outsmarts Greg in class. Another could be a mysterious janitor who seems to know a lot about the school's secrets. And perhaps a foreign exchange student who has really strange habits and becomes Greg's new friend or rival.
A young journalist could be added. He's eager to make a name for himself by getting the inside scoop on Billy the Kid. He follows Billy around, trying to interview him and in the process, gets caught up in the dangerous world of the outlaws.
A cyborg vampire hunter. This character could have been created specifically to hunt down Dracula and his minions. With their mechanical parts, they could have enhanced strength, speed, and the ability to analyze vampire weaknesses on the fly.
In Only Murders in the Building fan fiction, we could introduce a strict building inspector. He's always poking around, looking for code violations, but he might also be hiding something related to the murders. Another character could be a foreign exchange student who lives in the building for a short time. She has a different cultural background and way of thinking, which could help the main characters see the case from a new angle. And finally, a homeless person who has been camping near the building could be added. He has seen a lot of comings and goings around the building and might have some valuable information about the murders.
A new character could be an ancient wizard who has been in hiding for centuries. He could have knowledge about the Deathly Hallows that even Dumbledore didn't know. This character could appear to Harry and his friends and offer them guidance or a powerful magical artifact that helps them on their journey.