I'm not certain, but perhaps the main character is the boy in the diaper. And there could be other characters like his parents who sent him to the camp, or some kids at the camp who either befriend him or bully him because of his diaper - wearing situation. There may also be a camp leader who has a significant influence on the boy's experience at the camp.
Since I don't know the details of the story, I can't say for sure. But it might be the diaper - wearing boy himself as a main character. There could also be a camp counselor or a fellow camper who plays an important role.
Without knowing the story well, the obvious main character would be the 'diaper boy'. He is likely at the center of whatever events unfold at the camp. Additionally, there could be a group of friends he makes at the camp who are also main characters in terms of how they interact with him. And a strict or kind camp director could also be a main character, especially if they are involved in decisions regarding the boy's stay at the camp.
Chapter 173, "Su Yinwan, You Did It on Purpose, Right?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with Jiang Li finally rose from her seat. and closes on Yet Miss Su went out of her way to ask me not to be angry..
Chapter 238, "The Guests Were Dumbfounded, The Audience Was Excited", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Jiang Li was actually first on all three leaderboards?!. By the end, And, to Zhou Xu's alarm, they did find a problem..
Chapter 121, "Jiang Li Gains 5 Points for His Meritorious Rescue!", is the clearest early answer because it turns Jiang Li Gains's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Seeing that Wen Jiaojiao's condition had improved significantly,...
Chapter 213, "Shi Xu, You Must Understand How to Balance Meat and Vegetables", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Cheng also noticed where Jiang Shixu's attention lay.
Chapter 199, "You Found Out Long Ago?", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Damn, the production team is actually being so generous this time,...
Chapter 34, "Official Recording!", is the clearest early answer because it turns Wenwen's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Seeing that the public sentiment wasn't quite right, Su Yinwan felt...
Chapter 282, "Whereabouts Unknown", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with The other villagers quickly heard the commotion and hurried over. and closes on Why isn't there a live broadcast reporting on their itinerary?]....
Chapter 237, "Top of the Three Lists! Truly Deserved!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. A useful checkpoint is the way the scene starts with It seemed as if, believing the spilled water couldn't be recollected,...
Chapter 195, "Woke Up and the Base Was Stolen?!", is the clearest early answer because it turns Americano's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Yan was fully equipped and followed at the end of the team.
Chapter 491, "A Cleaner Handling", is the clearest early answer because it turns Zheng Xun's situation into a concrete plot event. The chapter gives readers a real answer by opening on After leaving the cave, the more Nina thought about it, the more...