Maybe there's an antagonist, like a dark bender who has turned to the wrong side and uses their powers for evil. This character would create conflict for the main bender characters, constantly challenging them and trying to disrupt the balance in their world.
One interesting storyline could be about the benders facing a new and powerful supernatural entity that challenges their abilities in unexpected ways. For example, they might encounter a spirit that can manipulate time, causing chaos in their world.
You can start by looking on fanfiction.net. It has a large collection of 'Supernatural' fanfictions, including those related to 'The Benders' episode. Another great place is Archive of Our Own (AO3). There are many talented writers who post their works there, and you can easily search for 'Supernatural The Benders' fanfics using the search bar.
Sometimes, there are recurring characters like certain spirits or demons that the Ghostbusters keep encountering. These characters can be considered main in the sense that they drive the plot forward by constantly challenging the Ghostbusters and forcing them to come up with new strategies to deal with the supernatural.
There could also be Castiel, the angel. He often plays a significant role in fanfictions, especially when there are revelations about the supernatural world or the plans of Heaven.
The main characters are most likely to be Sam and Dean Winchester. They are the heart and soul of the 'Supernatural' series, so in the fanfiction, they would continue to be central figures, facing new challenges or coming to terms with the end of their journey.
Well, obviously Gabriel is one of the main characters. He is often depicted as a complex and interesting character with his own set of powers and a unique personality. His mate is also a main character, though their identity and characteristics can vary from one fanfiction to another. Sometimes they might be a human who gets caught up in the supernatural world, or another supernatural being themselves.
The owner of the supernatural restaurant could be a main character. She is a centuries - old vampire who has seen the world change but has always maintained this one special place. And there could be a detective who is investigating strange disappearances that seem to be related to the restaurant. As he digs deeper, he realizes that the world of the supernatural is far more complex than he thought.
Well, clearly Billie and Jack. Billie is known for her role in the supernatural realm, especially when it comes to matters of life and death. Jack, on the other hand, is a character full of potential and mystery. Fanfiction writers like to play with their personalities and develop stories around how they interact with each other, the other characters in the 'Supernatural' universe, and the various threats and situations they face.
It depends on the specific fanfiction. However, it's likely that Sam and Dean Winchester would be main characters since they are central to the Supernatural series. They could be the ones actively trying to 'set it right' in whatever situation the fanfiction presents.