A local inhabitant of a planet where the Zillo Beast is found. This character could have a deep connection to the land and the legends surrounding the beast. They would have a unique perspective and knowledge that could be crucial in either taming or surviving encounters with the Zillo Beast.
The Zillo Beast should be shown as a powerful and fearsome creature. Describe its massive size, with scales that can deflect blaster bolts. It could move with a lumbering gait that still manages to be surprisingly fast when it charges.
Perhaps a story set during the Clone Wars where the Republic discovers a way to control the Zillo Beast and uses it as a weapon against the Separatists. But things go awry when the Beast breaks free from its control and starts wreaking havoc on both sides of the war, forcing the Jedi and the clones to find a new solution to stop it.
One idea could be a story where a young Jedi has to face the Zillo Beast in a secret underground lair on Coruscant. The Jedi must use the Force to understand the beast's motives rather than simply fight it.
A Mandalorian could be the main character. Mandalorians have a rich culture and history in Star Wars. A story about a Mandalorian who has to break from their traditional ways to save the galaxy from a new threat, like a powerful Sith Lord or a dangerous alien race, would be exciting. They could use their unique combat skills and armor to fight against the odds.
A Rebel pilot could be the main character. After getting injured in a battle and having some dental problems as a result, they decide to study dentistry while recovering. They then use their new skills to help their fellow Rebels. They might even find a way to use dental tools as weapons in a pinch, like using a dental drill to break through enemy ship controls if they are captured.
A young scavenger from a planet in the Outer Rim could be the main character. They find the Darksaber by chance and then are thrust into the larger Star Wars universe, having to learn about the weapon and deal with those who would kill to have it.
A young Twi'lek mechanic who has dreams of leaving her home planet and seeing the galaxy. She gets involved in a galactic conflict when a group of bounty hunters come after her for a device she unknowingly repaired that has important information for a powerful crime syndicate.
A scruffy - looking smuggler like Han Solo would be a great main character. He has the charm, the piloting skills, and the roguish attitude that would fit well into this kind of story.
It could also be an older, grizzled scout who has seen many battles and has a wealth of knowledge. This character could be a bit of a loner, preferring to work alone but getting drawn into a larger conflict. He might have some unique skills like being an expert in stealth or tracking. For example, he could be able to track down the most elusive bounty hunters or find hidden Rebel bases. He has a past full of secrets that gradually unfold as the story progresses.
It could be a young Jedi in training, someone full of potential but still inexperienced.