Well, in addition to the Stone Boy, there could be an elder in the story. This elder might be the keeper of the knowledge about the stone's origin. There could also be a sidekick for the Stone Boy, a character that provides some comic relief while also being helpful in the story's events. And there might be a shadowy figure that is always lurking in the background, adding an element of mystery and danger to the story.
As I don't know the story in detail, I can only guess that the Stone Boy himself is definitely a main character. There might also be a mentor figure, someone who helps the Stone Boy understand the significance of the stone he has.
Perhaps there is an antagonist in the 'Stone Boy serial story'. This could be someone who wants the stone for their own evil purposes. And there may be friends of the Stone Boy, characters who stand by him through his adventures and help him when he's in trouble. They could be other kids or magical creatures in the world of the story.
Chapter 552, "Branches, 20 Points Each, No More", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. Early on, Jiang Cheng smelled the scent and crawled out of the shed, but before....
Chapter 414, "The White Knife Goes In, The Red Knife Comes Out", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter turns that into something concrete by moving from Third Master really lives up to his reputation; his skills are...
Chapter 415, "No Food, But Your Life", is the clearest early answer because it turns Pan Xing's situation into a concrete plot event. Early on, Are you begging me for food now?. By the end, Isn't the food and drink on the cruise much better than here?" Seeing....
Chapter 423, "A Scumbag!", is the clearest early answer because Nina gets a payoff that changes the stakes. A useful checkpoint is the way the scene starts with Are you hurt?" Yu Li asked, panting. and follows through with [Hahahaha I'm dying of laughter, why does the style change when it....
Chapter 317, "You Can't Afford to Mess with the Person Behind Her!", is the clearest early answer because it turns Capital's situation into a concrete plot event. The chapter gives readers a real answer by opening on He Pingzhang gazed at the man curled up before him, unable to...
Chapter 415, "No Food, But Your Life", is the clearest early answer because it turns Tong Xiaoqi's situation into a concrete plot event. Early on, Are you begging me for food now?. By the end, Isn't the food and drink on the cruise much better than here?" Seeing....
Chapter 163, "She Actually Gave President Shang a Zero?!", is the clearest early answer because it turns Jiaojiao's situation into a concrete plot event. The chapter gives readers a real answer by opening on Su Yinwan entered a small room, guided by a staff member.
Chapter 570, "A Simple Auto-Attack Baits Out an Ultimate from the Enemy", 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 What the heck is that?" "??
Chapter 792, "Is This, This God Jiang?!", is the clearest early answer because it turns Jiang Yu's situation into a concrete plot event. The chapter turns that into something concrete by moving from The sound of the suona did not appear abruptly but even ignited the...
Chapter 398, "Have You Finally Decided to Use Gu on Your Family?", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event. It opens with Over the next month, Jiang Li drew up a detailed schedule— Up at 5:30...