One reason could be overeating. Just like in real life, if a cartoon girl constantly consumes large amounts of food, especially junk food like chips and soda, she will gain weight. Another reason might be a lack of exercise. If she is always sitting around and not being active, her body will store more fat.
Well, in a story, it could be due to emotional eating. Maybe the cartoon girl had some tough times, like losing a friend or facing difficulties at school. So she turned to food for comfort, which led to weight gain. Also, some sort of magic spell or potion could be involved. For example, she drank a magic drink that made her gain weight without her realizing it at first.
The best chapter pointer here is Chapter 4, "She Can Actually Tell Fortunes?!". It opens with Qiao regretted her words as soon as they left her mouth. and closes on A little girl acting mysterious, learning fortune-telling, what is this....
Chapter 905, "I Plan to Quit the Circle", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event. The chapter turns that into something concrete by moving from The loud slogans echoed repeatedly across the expansive lawn.
Chapter 627, "Definitely Not an Accident", is the clearest early answer because it turns Bai Lu's situation into a concrete plot event. It opens with He looked at the sinister smile lingering in Jiang Li's eyes, then at... and closes on No one in this world was worthy of his sister!.
Chapter 920, "College Entrance Exam Results Inquiry", is the clearest early answer because it turns Jiang Zhao Yuan's situation into a concrete plot event. Early on, Outside the nursing home, Meng WanZhi anxiously waited in the car for....
Chapter 911, "You Have Three Children?", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. Early on, Jiang Bufan stood still, with his eyebrows furrowed, as if he was....
Chapter 522, "The First Test for the Scion of the Wealthy Family Has Arrived", is the clearest early answer because it turns Wilderness Survival's situation into a concrete plot event. The chapter gives readers a real answer by opening on The assistant director's execution was swift;
The best chapter pointer here is Chapter 11, "She Smiled, He Panicked". It opens with After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and closes on Miss Qin, please accompany us to the police station to explain this....
Chapter 618, "Abandoned Again", is the clearest early answer because it turns Jiang Lijiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Upon hearing this, Jiang Cheng looked at Su Yinwan in disbelief.
Chapter 663, "How Did These Two Start Fighting?!", is the clearest early answer because the buildup finally cashes out in a real clash. The chapter gives readers a real answer by opening on Jiang Shixu received the message in daylight the next day.
Chapter 529, "Truly a Magical and Complicated Person", is the clearest early answer because it turns Zhuola's situation into a concrete plot event. The chapter turns that into something concrete by moving from As for the specifics of how unlucky she would be, or to what extent,...