Without having read the 'barriers graphic novel', it's impossible to say for sure who the main characters are. But they could be people who are directly affected by the barriers in the story. For instance, if the barrier is a social class divide, the main characters might be from different social classes trying to bridge the gap. Or if it's about a personal mental barrier, the character could be someone on a journey of self - discovery to overcome that.
I don't know the main characters as I haven't read it.
Since I haven't had the chance to read 'barriers graphic novel', I can't name the main characters. However, in general, in a graphic novel about barriers, the main characters are likely to be those who are either trying to break down the barriers or those who are creating or maintaining them. They could be ordinary people in extraordinary situations, or they could be special individuals with unique abilities or perspectives that are relevant to the barrier - related story.
Chapter 716, "Cook a Special Meal", is the clearest early answer because it turns Chixia Village's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The following week was much quieter, and Jiang Li finally had some...
Chapter 712, "This is definitely not reliable!", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Exactly, exactly." Wen Jiaojiao said discontentedly, her arms crossed.
Chapter 742, "Brother Policeman, Look at Them!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Fang Kai became panicked as things were not developing in his favor.
Chapter 704, "Even if I were a slave, I would be willing!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Wu Daoshan looked at Zhao Lang in shock.
Chapter 594, "Raising Soldiers for a Thousand Days, Using Them for a Moment", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Thinking of this, Jiang Yan squeezed himself next to Zhao Lang while...
Chapter 912, "Identical Four Pillars of Destiny?!", is the clearest early answer because it turns Wan Huixia's situation into a concrete plot event. It opens with But the repeated blows made Wan Huixia's husband lose his confidence...
Look to Chapter 2 for the clearest answer. It begins with On the top floor of the Financial Building, a gathering of dark clouds..., keeps building through How dare Jiang Li hang up his phone?, and lands on Jiang, Lin Manru, turned pale and quickly explained, "It's not eloping, my....
Chapter 902, "Sister, Please Have Your Meal", is the clearest early answer because it turns Wen Jiaojiao's situation into a concrete plot event. The chapter turns that into something concrete by moving from The college entrance exams over these two days took quite a toll on...
Chapter 743, "They Have Already Been Released", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event.
Chapter 893, "From today onwards, he is my half-brother from another father and mother!", is the clearest early answer because the buildup finally cashes out in a real clash. It opens with Jiang Yan still had unwavering faith in Daniu's character.