There's no way to be certain about the main characters without more details. But it's possible that the main characters are individuals who are part of a world where beauty is both a goal and a source of conflict. For instance, there could be characters who are competing for a beauty - related prize or recognition, and their personalities and relationships are explored throughout the visual novel as they strive for their goals related to beauty.
Since I don't know the details of this 'beauty bounce visual novel', the main characters could be those who are in search of beauty in different ways. Maybe there's a young protagonist who is trying to understand the true meaning of beauty and along the way meets various characters that help or hinder this journey. There could also be a mentor - like figure who has a different view on beauty and guides the main character through different situations.
Look to Chapter 124 for the clearest answer. It begins with Since there were too many points cards inside Jiang Li's barrel, Director..., keeps building through However, Jiang Li merely lifted her eyelids and said indifferently, "No..., and lands on No need to repeat that number three times.].
A practical answer is Chapter 91, because it turns the idea into a concrete scene. The chapter opens with When Jiang Li saw that he had been assigned a harrow, Qi Tianyu felt his..., adds pressure through Jiang Yan, you have to work hard this afternoon;
The best chapter pointer here is Chapter 80, "Princess Wen, Your Lunch is Escaping!". It opens with Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and closes on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....
The best chapter pointer here is Chapter 109, "Not One Deserves to Stay on His Friends List!". It opens with And another thing," Jiang Li said, taking out a tissue to wipe her lips,... and closes on [You're indeed more likable than me, the type of likable where people....
A practical answer is Chapter 122, because it turns the idea into a concrete scene. The chapter opens with Damn, are we supposed to find the points card in the mud?!" He had just..., adds pressure through It wasn't intentional!" Bullet screen: "[Qi Tianyu, you really need to be..., and ends on He.
If you want the clearest chapter reference, go to Chapter 116. Early on, But before the audience in the live room had time to continue brewing the...; later, the chapter leans on Jiang Yan quickly entered the room, and a few minutes later, he dashed out....
If you want the clearest chapter reference, go to Chapter 73. Early on, Director Sun, tongue-tied, finally managed to squeeze out a sentence,...; later, the chapter leans on But isn't it due to your production team's lack of consideration?.
A practical answer is Chapter 88, because it turns the idea into a concrete scene. The chapter opens with She wanted to refuse, but didn't have the courage to do so., adds pressure through Jiang Yan immediately stepped forward, "I have one point, quick, quick,..., and ends on Let's go," Jiang Li.
The best chapter pointer here is Chapter 71, "The Theme of the First Day—Breaking New Ground!". It opens with Shu Yan curled her lips with a hint of jealousy, "When can it be my turn... and closes on Now they had to work on an empty stomach..
If you want the clearest chapter reference, go to Chapter 89. Early on, Director Sun took a step back, "What's the rush?; later, the chapter leans on It's true about the go-kart costing one point, but this time we're using....