A third theme could be self - discovery. The little brother may be on a journey to find out his true potential, and as he discovers more about himself, he realizes that he can be 'bigger' in terms of his capabilities and contributions. For example, he might find out he has a talent for art or music that not only enriches his own life but also impacts those around him positively, making him a 'bigger' presence in the story.
One possible theme could be growth. The little brother might start out small and weak but grow in strength, character, or influence, becoming 'bigger' in different ways as the story progresses.
Another theme could be the underdog. Since he's the little brother, he might be underestimated, but then he overcomes odds and shows that he's more than what others thought. This theme of defying expectations and rising above is quite common in stories. Also, the theme of family loyalty can be there. He, as the little brother, might be doing things for the sake of his family, which in turn makes him 'bigger' in the eyes of his family members and in the overall story.
Chapter 116, "Group Freeloading!", is the clearest early answer because it turns Sister Li's situation into a concrete plot event.
Chapter 349, "Attempting to Cheat, East Ridge's Strength, Lu Yang's Tactics", is the clearest early answer because it turns Zhu Tong's situation into a concrete plot event. Early on, The saying "Gaining ten thousand jins of silver is not as valuable as.... By the end, Even if you escalate it to Dean Gu, we still can't deliver." "That's....
Chapter 523, "Are the Researchers Sweating Profusely Now?", is the clearest early answer because it turns Researchers Sweating Profusely's situation into a concrete plot event.
Chapter 169, "This is What Happens to Show-offs!", is the clearest early answer because it turns Director Sun's situation into a concrete plot event. The chapter turns that into something concrete by moving from Everyone: "What?!" Seeing the shocked and bewildered expressions on...
Chapter 169, "This is What Happens to Show-offs!", is the clearest early answer because it turns Show's situation into a concrete plot event. Early on, Everyone: "What?!" Seeing the shocked and bewildered expressions on....
Chapter 175, "He Tampered with the Food", is the clearest early answer because it turns Sister Li's situation into a concrete plot event. Early on, Wen Jiaojiao's eyes nearly rolled back into her head.. By the end, Su Yinwan, who had heard half his words, was a bit puzzled..
Chapter 158, "It's Time to Recruit Someone Who Understands Mysticism to Work Here", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event.
Chapter 153, "Word Spreads, Director Sun Takes the Lead in Shipping the CP!", is the clearest early answer because it turns Director Sun Takes's situation into a concrete plot event.
Chapter 342, "This is our Hua Country's archery", is the clearest early answer because it turns Daniel's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Some horses fell in the mud pits and never got up, some remained...
Chapter 287, "Saved", is the clearest early answer because it turns Saved's situation into a concrete plot event. A useful checkpoint is the way the scene starts with For five consecutive days, the search and rescue team had not...