Given that it's called 'bella cancer fanfic', Bella is likely the central character. In addition, if it follows the common patterns of stories about illness, there could be a doctor or a nurse character who is involved in her treatment and care. Also, her closest friend who provides emotional support could be another main character. There may be a character who represents the outside world's reaction to her illness, like a schoolmate or a neighbor.
As I don't know the specific 'bella cancer fanfic', it's hard to say for sure. But presumably, Bella would be one of the main characters since she is in the title. There might also be her family members, like her parents or siblings, and perhaps her friends or a love interest who play important roles in the story.
If you want the clearest chapter reference, go to Chapter 65. Early on, Several minutes later, the room remained silent.; later, the chapter leans on The cameraman then discovered that Jiang Li's door wasn't properly shut,....
A practical answer is Chapter 5, because it turns the idea into a concrete scene. The chapter opens with Actually, when Manager Fang saw Jiang Li, he was somewhat surprised., adds pressure through How the hell did you get in?!, and ends on Recently, he did suspect that his wife was cheating on.
If you want the clearest chapter reference, go to Chapter 69. Early on, Since the phones issued by the program team couldn't log into Weibo, Wen...; later, the chapter leans on However, He Yun, who had witnessed the incident, knew a bit about it..
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....
Look to Chapter 42 for the clearest answer. It begins with You've all met now, so this game is very simple," Director Sun said., keeps building through That is, give each of the other five people in the room a score based on..., and lands on As the plane hadn't taken off yet, and the live camera.
A practical answer is Chapter 53, because it turns the idea into a concrete scene. The chapter opens with Night had fallen over Chixia Village, eerily void of any human sounds., adds pressure through How does she manage that?] [Now, I really think all the negative press..., and ends on Wait, did.
Chapter 932, "Gu Pansheng [Extra · Main Character Chapter]", is the clearest early answer because it turns Xiao Chu's situation into a concrete plot event. The chapter turns that into something concrete by moving from Gu as in 'Gu Pansheng,' Pan as in 'Gu Pansheng.' I am four years old...
If you want the clearest chapter reference, go to Chapter 5. Early on, Actually, when Manager Fang saw Jiang Li, he was somewhat surprised.; later, the chapter leans on Because she was really too beautiful, and very young, completely different....
Chapter 33 is the strongest chapter-level answer because it starts from Following the announcement, five artists respectively reposted the Weibo—... and follows through on Although Su Yinwan was considered half a goddess to him, the whole thing....
If you want the clearest chapter reference, go to Chapter 43. Early on, The moment He Yun willingly sat next to Jiang Li and even took off his...; later, the chapter leans on Movie Emperor He, where's your aloof persona?" "Waaah, He Bao, Mommy....