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.
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.
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.
Chapter 214 is the strongest chapter-level answer because it starts from Director Sun fell silent for a second. and follows through on Even when Wen Jiaojiao fanned Richards' face frantically, he remained....
Look to Chapter 229 for the clearest answer. It begins with Huo Ziyang's face had already turned deathly pale., keeps building through Huo Xuan, how did she come to know about this?!, and lands on Isn't it enough to teach a child a lesson when he makes a mistake?.
Look to Chapter 278 for the clearest answer. It begins with People from the fan club also got word that Jiang Li was soon to return to..., keeps building through Early in the morning, as the president of the fan club, Lu Xingchao..., and lands on How about we throw a party instead?" He Yun was.
A practical answer is Chapter 268, because it turns the idea into a concrete scene. The chapter opens with To ensure the company's successful listing, Shen Lan even went so far as..., adds pressure through Having chosen to be his wife, she was determined to be responsible for his..., and ends on.
The best chapter pointer here is Chapter 266, "He Really Deserves to Die!". It opens with Upon hearing this, the deputy director's expression also turned serious. and closes on Now I see why Jiang Li despises her brother so much, utterly unreliable!"....
A practical answer is Chapter 219, because it turns the idea into a concrete scene. The chapter opens with Qi Tianyu was somewhat freaking out., adds pressure through —[This agricultural expert is the real deal.] After all, if the production..., and ends on Having any yield at all was already the.
Look to Chapter 264 for the clearest answer. It begins with Jiang Li first reassured her mother, then opened the chat box with Shen..., keeps building through She had just sent a message when Shen Lan's video call came through., and lands on [Do your faces hurt, you rumormongers?.
A practical answer is Chapter 228, because it turns the idea into a concrete scene. The chapter opens with Huo Ziyang had not stepped out of the house for a whole week., adds pressure through She would never allow such scum in her family!, and ends on Why did you hit Ziyang?" Huo Xuan, one hand.