Since I haven't read the novel, I can't say for sure who the main characters are. However, it's likely that there is a protagonist who is on a journey related to their dantian. There may also be a mentor figure who helps the main character understand and develop their dantian powers.
I'm not familiar with the specific 'endless dantian light novel', but in such novels, there is often a young and determined main character. Maybe there's a male lead who is born with an unusual dantian and has to face the envy and challenges from others. There could also be a female character who is either a love interest or a powerful ally, perhaps with her own unique abilities related to the dantian concept.
Without having read the 'endless dantian light novel', it's hard to name the exact main characters. But in many novels of this kind, we can expect a central figure who is on a quest to unlock the secrets of their dantian. There might be side characters like friends who join the main character on their adventures, or antagonists who try to prevent the main character from achieving their full potential with their dantian.
If you want the clearest chapter reference, go to Chapter 241. Early on, It wasn't the director," Jiang Yan said with a blank expression, "Did you...; later, the chapter leans on Even if it was a slip of the tongue, how could you make such a mistake at....
Look to Chapter 237 for the clearest answer. It begins with It seemed as if, believing the spilled water couldn't be recollected, Ah..., keeps building through Why did I do this?" "Senior, have you forgotten your own glory?" "I..., and lands on The netizens responded in chorus, and no one insisted.
Chapter 267 is the strongest chapter-level answer because it starts from Jiang Li had just turned around when she was suddenly embraced by a... and follows through on —However, he was indeed about to experience some misfortune..
The best chapter pointer here is Chapter 231, "vLet Me Check Out the Strength of 5000". It opens with Huo Xuan felt a burst of secret delight in her heart. and closes on A cool sports car was one hundred thousand bucks..
If you want the clearest chapter reference, go to Chapter 234. Early on, Given the vast mystical powers Jiang Li had displayed before, he was...; later, the chapter leans on Master, what's wrong with me?" Jiang Li said, "I see that in your recent....
Look to Chapter 226 for the clearest answer. It begins with What was all that before then?, keeps building through Jiang Li quickly tapped the screen twice, and a red packet link that was..., and lands on Are you sure you can be on the list of winners?] Zhou Xu: [?.
Look to Chapter 236 for the clearest answer. It begins with The short-haired youth beside them chimed in, "That's right, senior, we..., keeps building through It's getting late, and if we delay any longer, I'm afraid the wind..., and lands on Everyone, try not to get too anxious." The crowd.
If you want the clearest chapter reference, go to Chapter 244. Early on, LOL, Director Sun can't seriously think his sappy quotes are working, can...; later, the chapter leans on Yet, Director Sun was indulged in the emotions of having moved himself and....
A practical answer is Chapter 265, because it turns the idea into a concrete scene. The chapter opens with As expected, the truth behind the video was unearthed one by one and..., adds pressure through Although his accomplices have also shared some information, there's still..., and ends on Miss.