I don't know for sure as it depends on the specific fanfic. It could be the side characters who are usually in the background of the main story but are brought to the front in this fanfic. Maybe it's the managers, the makeup artists, or the stagehands who have their own stories to tell.
Since we don't have more details about the 'behind the spotlight fanfic', it's hard to say exactly who the main characters are. But if it's about a movie - making world, it could be the screenwriters, the directors' assistants, or the prop masters. These are the people who work behind the scenes and could be the focus in such a fanfic. They might have their own dreams, conflicts, and relationships that are explored.
In a 'behind the spotlight fanfic', the main characters could be anyone who is part of the world that exists out of the public eye in the original story. For instance, if it's a fanfic related to a theater production, it could be the understudies waiting for their chance to shine, the ushers who see all the drama both on and off stage, or the set designers who create the magical worlds for the actors. Their personalities, their hopes, and their challenges could be the central focus of the fanfic.
Look to Chapter 57 for the clearest answer. It begins with Lu Xingchao's numerous fans were stunned., keeps building through Holy shit, what's up with God L?, and lands on I'm saying, big bro, can you at least reply to me?.
The best chapter pointer here is Chapter 67, "You Can Still Pick Mushrooms?!". It opens with I'm pissed," Jiang Yan cursed again, "These people are too much, aren't... and closes on Accompanied by the wisps of smoke gradually rising from the stove behind....
Look to Chapter 55 for the clearest answer. It begins with Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had..., keeps building through Yet she was clearly the wretched cannon fodder of this book., and lands on He Yun's fans were immediately displeased..
A practical answer is Chapter 51, because it turns the idea into a concrete scene. The chapter opens with Oh, okay." After uttering two syllables indifferently, Jiang Li bent down..., adds pressure through With this in mind, she looked up and scrutinized the worried faces in..., and ends on If I.
Chapter 86 is the strongest chapter-level answer because it starts from After over an hour of fuss, it was finally time to eat. and follows through on But then her expression became resolute and arrogant..
If you want the clearest chapter reference, go to Chapter 84. Early on, When the villagers tasted his curry beef one by one, their faces revealed...; later, the chapter leans on In the end, he could only secure a score of 5..
Look to Chapter 111 for the clearest answer. It begins with The main room's door was pushed open just a crack, and the head of the..., keeps building through Miss Jiang, you're still up, that's great., and lands on This time it was in a dream..
If you want the clearest chapter reference, go to Chapter 55. Early on, Su Yinwan hadn't expected that, in just one day, Jiang Li's reputation had...; later, the chapter leans on Yet she was clearly the wretched cannon fodder of this book..
A practical answer is Chapter 63, because it turns the idea into a concrete scene. The chapter opens with During those seven days, he thought he had completely escaped from that..., adds pressure through It was better not to disturb him., and ends on It was already past midnight, but the.
The best chapter pointer here is Chapter 49, "Mysticism Girl Jiang Li". It opens with My phone!!!" Jiang Yan's roar echoed continuously through the mountains in... and closes on Thinking this, Jiang Yan marched forward, pulled Jiang Li down from her....