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.
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.
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.
Chapter 511, "I'm Here to Notify You, Not to Discuss With You", is the clearest early answer because it turns Grandfather's situation into a concrete plot event. It opens with The man had changed out of his previously luxurious traditional...
Chapter 485, "Straight On Clash!", is the clearest early answer because the buildup finally cashes out in a real clash. A useful checkpoint is the way the scene starts with Zheng Xun felt even more irritable after the phone call. and follows through with This round was definitely hers to win!.
Chapter 358, "That dress of hers must be a fake!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. It opens with I just drove here slowly." In an instant, all cameras swiveled in his...
Chapter 503, "How could they let an actor marry in?", is the clearest early answer because it turns Jin's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The servants standing outside the gilded mahogany gateway were all...
Chapter 425, "Congratulations on Becoming a Substitute Guest!", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event.
Chapter 641, "Congratulations to Jiang Li for Taking the Top Spot!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Surrounded by a sea of fire.
Chapter 329, "This Role is Tailor-Made for Her!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Looking further down, it was all about Jiang Li trending again.. By the end, Inside, there was a lengthy passage written expansively;
Chapter 339, "Today's Windfall Luck!", is the clearest early answer because it turns Li's situation into a concrete plot event.
Chapter 403, "Neither Jiang Lijiang nor Jiang Yan Came?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Now our helicopter has arrived above the harbor in Yan City, and....
Chapter 393, "Clearly Marked Prices, No Deception to Young or Old", is the clearest early answer because it turns Support Brother Tang's situation into a concrete plot event.