Judge Dredd is most likely a main character.
Probably Judge Dredd is the central figure. He is the law enforcer in the Dredd universe. There may also be some supporting characters like other judges or maybe some key villains that are causing the chaos.
The 'Dredd Day of Chaos Graphic Novel' probably features Judge Dredd facing off against various threats that are causing chaos in the city. It could involve new and dangerous criminals, political unrest, or perhaps some sort of disaster. Judge Dredd has to use his skills and the power of the law to try and restore order. There might be cool action scenes, moral dilemmas, and exploration of the unique society in which Dredd operates.
The central character is without a doubt Judge Dredd. He's the face of the law in the chaotic world of the graphic novel. His character is defined by his strict adherence to the law. Then there's Judge Anderson. She brings a different perspective as she has psychic abilities. There are also various villains that play important roles in the stories, like some of the powerful crime lords in Mega - City One who constantly test Dredd's resolve.
The extreme level of chaos depicted. In most graphic novels, there's some order, but in these, it's all about the breakdown of society in Mega - City One. It's a unique take on the Judge Dredd universe.
There are also characters like Rico, who has his own story arc and is related to Judge Dredd in an interesting way. And then there are the various criminals and citizens that Judge Dredd deals with, each adding to the complexity of the story world.
Judge Dredd is the central character, of course. He's known for his strict enforcement of the law. Judge Giant is another character that often appears. He's a reliable ally to Dredd. And we can't forget about Judge Hershey, who plays significant roles in different story arcs and has her own leadership qualities.
One of the great ones is the main 'Judge Dredd Day of Chaos' graphic novel itself. It's full of intense action and really shows the chaos that erupts in the Judge Dredd universe. Another good one could be related graphic novels that set the stage for the Day of Chaos, like those that explore the political and social unrest in Mega - City One prior to the main event.
Given the name 'chaos graphic novel', the main characters might be ones that are shaped by the chaotic environment they live in. They could be survivors in a world that has been thrown into chaos. One character might be a scientist who is trying to understand the chaos through research, while another could be a warrior fighting against the chaos - induced threats. There could also be a young character who is just beginning to discover the true nature of the chaos around them and is learning how to adapt.
Since I haven't read it, I can only assume that Dredd is one of the main characters as it's in the title. There might be other characters like his allies in the law enforcement or the antagonists who are related to the 'death' aspect in the story.
In Dredd Science Fiction, there are often characters like Judge Dredd himself. He is a law enforcer in a very harsh and futuristic world. There are also likely to be villains who oppose the order he represents.
I don't know for sure as I haven't read it. But it could be a group of kids who are excited about the snow day and want to make the most of it.