Without reading the 'Black Hammer 3 Graphic Novel', it's difficult to determine the exact main characters. But in the Black Hammer universe, there are a variety of interesting characters. Some of the more prominent ones could be Barbalien. He's an alien in a human world, and his story arc could be continued or expanded in this graphic novel. Another possibility is that some of the lesser - known characters from earlier in the series could be given more prominence and become main characters in this volume, as often happens in a series to add new dimensions to the story.
I'm not sure which characters are the main ones in this specific volume. But in the Black Hammer series in general, there are likely to be characters like Abraham Slam, Golden Gail, and Colonel Weird. They could very well be the main focus in this graphic novel as well.
Since I haven't read 'Black Hammer 3 Graphic Novel', I can only guess. If it follows the pattern of the previous installments, characters like Talky - Walky might be main characters. Also, the heroes who have unique powers and personalities, like Madame Dragonfly, could be among the main cast. They might be facing new challenges or having new interactions that drive the story forward.
Chapter 211, "Elite System, Mining, and Cheng Ping's Grudge (Part 2)", is the clearest early answer because it turns Hive Camp's situation into a concrete plot event. Early on, The Hive Camp has more than thirty thousand people, with the most.... By the end, Seeing the incredulity on Xia Hong's face, Luo Ming showed a helpless....
Chapter 162, "Once and For All, Victory", is the clearest early answer because it turns Xia Hong's situation into a concrete plot event. The chapter turns that into something concrete by moving from The remaining forty-plus Earth-digging Realm individuals continued to... to Before the cold beast tide arrived, Xia Hong had already successfully....
Chapter 148, "Mysterious Visitor, Deciphering the Cold Resistance Level [Vote for Monthly Pass]", is the clearest early answer because Hunting Team finally turns buildup into a real advancement. It opens with Listening to the voice, it seems to be... and closes on That person is really too courteous..." Xia Hong's expression was.... The key payoff is that it turns Hunting Team's growth into a concrete upgrade step and sets up the next payoff in the power growth storyline linked to Gao Yu.
Chapter 199, "The Hong Gang Family—Good News Abounds", is the clearest early answer because it turns Hong Ye's situation into a concrete plot event. A useful checkpoint is the way the scene starts with [Jade Bone, arm bone of Advanced Cold Beasts, full of Blood Marrow,... and follows through with At the dining table, watching her husband and two sons drink bowl....
Chapter 131, "The Entire Hunting Team Breaks Through", is the clearest early answer because it turns Blacksmith Room's situation into a concrete plot event. Early on, The panic brought by the Deceitful Monster visibly spread throughout.... By the end, The door opened, and Xia Chuan entered with a smile on his face,....
Chapter 134, "Difficult Hunt [Warm Sun Tycoon Extra 3/10]", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on Long defense will inevitably lead to loss, especially when mobility... and ending on The rest of the team stepped back a few steps, leaving Xia Chuan....
Chapter 141, "Intermediate Thunder Kui, Second Reshaping Skin【Three in One】", is the clearest early answer because it turns Yuan Cheng's situation into a concrete plot event. The chapter gives readers a real answer by opening on Deep in Redwood Ridge, an Intermediate Snow Mane with Iron Arrows... and ending on Roar..." Pain drove the Snow Mane into even more of a frenzy, the....
Chapter 196, "Sword Puppet, the First Intermediate Squad", is the clearest early answer because it turns Thunder Kui's situation into a concrete plot event. It opens with First Year of Great Xia, May 20th Redwood Ridge, three kilometers... and closes on Countless Iron Arrows suddenly attacked from all directions,.... The key payoff is that the chapter closes with The light golden exterior of the Thunder Kui provides strong defense;
Chapter 128, "The Arrival of the Earth-digging Realm Boom Period", is the clearest early answer because Shi Ping finally turns buildup into a real advancement. Early on, In the dead of night, fierce winds howled.. By the end, However, if they dare to cross into Redwood Ridge, then we might as.... Inside the broader trade and resources storyline, the chapter closes with "Yes, leader!, which gives Shi Ping a stronger narrative position and pushes the power growth onward.
Chapter 152, "Mirror Immortal's Killing Intent, Who Has Fallen?", is the clearest early answer because the violence around Xia Hong becomes final instead of hypothetical. A useful checkpoint is the way the scene starts with After saying this, Xia Chuan turned to look at Xia Hong and... and follows through with Worse yet, that huge wave of at least two or three hundred people on....