For Aden, he could be developed by showing his growth in dealing with his past traumas. Maybe he starts to open up more about his difficult childhood and how it has affected his relationships, especially with Belle. This would make him more empathetic.
They could also be developed together by going through a major crisis as a couple. Let's say there's a natural disaster in the town. How they support each other, make sacrifices, and come out stronger on the other side would really deepen their characters and their relationship.
A practical answer is Chapter 11, because it turns the idea into a concrete scene. The chapter opens with After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and..., adds pressure through Qin, could you pour me a cup of tea as well?, and ends on Miss Qin, please accompany us to.
Chapter 36 is the strongest chapter-level answer because it starts from But soon, people began to question the authenticity of Jiang Li's bare... and follows through on After swallowing the food in his mouth, he hurriedly took his megaphone....
Chapter 923, "Eight-legged essay?!", is the clearest early answer because it turns Director Hao's situation into a concrete plot event. The chapter gives readers a real answer by opening on I just went to her house for a meal, even if my relationship with my...
If you want the clearest chapter reference, go to Chapter 59. Early on, After walking for about two or three hundred meters, the old man stopped...; later, the chapter leans on Jiang Yan followed his pointing direction and was instantly dumbfounded..
If you want the clearest chapter reference, go to Chapter 8. Early on, The resentment that had barely calmed among the crowd surged back two...; later, the chapter leans on Some of them were relatives of the Jiang Family, who felt it improper to....
Chapter 841, "Isn't this Daniu?", is the clearest early answer because it turns Daniu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Zhao Lang took the photograph and glanced at it, chuckling, "It...
Chapter 912, "Identical Four Pillars of Destiny?!", is the clearest early answer because it turns Lin Manru's situation into a concrete plot event. A useful checkpoint is the way the scene starts with But the repeated blows made Wan Huixia's husband lose his confidence...
If you want the clearest chapter reference, go to Chapter 20. Early on, Several people turned their heads upon hearing the sound and saw three...; later, the chapter leans on She was clad in a long black dress, and the dull color did not hide her....