Without having read the specific 'radiant light novel', it's difficult to name the main characters. However, in a general light novel scenario, it could be a young mage as the main character who is trying to master their radiant magic. There might also be an older mentor figure who guides the main character. And there could be an antagonist who is envious of the main character's radiant qualities and tries to stop them from achieving their goals.
Since I don't know which 'radiant light novel' you are referring to, I can't say for sure. It could be a young protagonist on a journey of self - discovery, or a group of friends with different personalities.
There's no way to know without more details. It might be a lone warrior with a mysterious past as the main character. Or perhaps it's a female lead with special abilities who is the central figure in the story. There could also be a sidekick character who plays an important role in the plot.
A practical answer is Chapter 156, because it turns the idea into a concrete scene. The chapter opens with Flash Change, who was always tardy, was late again today., adds pressure through Why should we get up early to exercise and run, while he, Jiang Yan, gets..., and ends on Soon after, the.
A practical answer is Chapter 125, because it turns the idea into a concrete scene. The chapter opens with Next, it was Qi Tianyu's turn., adds pressure through I was planning to plant roses in my field." Director Sun said, "There were..., and ends on He deliberately chose the most inconspicuous.
The best chapter pointer here is Chapter 160, "The Mushroom-Picking Party of Six". It opens with As the sky gradually darkened, the originally mild drizzle began to... and closes on Then came Shu Yan and Jiang Li, while He Yun silently moved to the back of....
The best chapter pointer here is Chapter 126, "The Production Team Actually Played Dirty on This?!". It opens with Wen Jiaojiao initially wanted to cause trouble. and closes on The trolls lurking in the live stream immediately seized the opportunity....
The best chapter pointer here is Chapter 132, "Looking at me with that kind of eyes, are you afraid I'll eat you?". It opens with The new girl in the live-streaming room went crazy. and closes on He stir-fried the other dishes Jiang Li had prepared, and somehow managed....
The best chapter pointer here is Chapter 113, "Morning Exercise Check-in Group!". It opens with The next day, Jiang Lili was up before dawn as usual. and closes on If things are really as you say, that is indeed quite serious..
A practical answer is Chapter 123, because it turns the idea into a concrete scene. The chapter opens with After He Yun also carefully rolled up her trouser legs and walked down..., adds pressure through Master Jiang is awesome!!!] [Those who said Sister Li had insider help can..., and ends on.
If you want the clearest chapter reference, go to Chapter 122. Early on, Damn, are we supposed to find the points card in the mud?!" He had just...; later, the chapter leans on To salvage his image, he had deliberately dressed up before leaving the....
Chapter 120 is the strongest chapter-level answer because it starts from Facing the sudden and somewhat strange request from Jiang Li, Director Sun... and follows through on Drink this." Wen Jiaojiao looked at the half cup of thick substance:....
Look to Chapter 159 for the clearest answer. It begins with Seeing the red light of the camera turn on, Su Yinwan looked at the..., keeps building through Sorry, director, it was my staff who didn't arrange things well, that's..., and lands on Shang Shaobai, who was browsing through files.