Jack is a great character to focus on. He's the main character, so there's a lot of material to work with. His growth in martial arts and his relationships with the other characters are rich areas to explore. For example, you could write about his struggle to master a new move and how his friends help him.
Rudy is also a good choice. He's the sensei, and his relationship with the students is both comical and meaningful. A fanfic could center around Rudy's past as a martial artist and how he imparts his wisdom (or sometimes lack of it) to the kids. Plus, his eccentricities make for interesting storytelling.
If you want the clearest chapter reference, go to Chapter 51. Early on, Oh, okay." After uttering two syllables indifferently, Jiang Li bent down...; later, the chapter leans on By the time she reacted, Jiang Li had already disappeared at the end of....
The best chapter pointer here is Chapter 33, "Variety Show of Villains". It opens with Following the announcement, five artists respectively reposted the Weibo—... and closes on Although Su Yinwan was considered half a goddess to him, the whole thing....
The best chapter pointer here is Chapter 46, "Why Am I Second to Last?!". It opens with Upon hearing this, everyone but Jiang Li perked up with high alert. and closes on Did you calculate the score incorrectly?!" And 13 points?!.
A practical answer is Chapter 38, because it turns the idea into a concrete scene. The chapter opens with Jiang Li had also observed the girl who had just entered., adds pressure through When did Jiang Li become so rational and composed?!, and ends on He Yun coldly turned his head and continued to.
Chapter 29 is the strongest chapter-level answer because it starts from Big brother, it's me..." The shadow suddenly spoke and it was Jiang... and follows through on Big brother, are you unwilling?" His mournful expression seemed to signal....
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....
A practical answer is Chapter 56, because it turns the idea into a concrete scene. The chapter opens with Lei Shen originally had no idea about the trending topics on Weibo., adds pressure through So, bring it on, Blackie, starting today, I am Jiang Li's diehard fan!, and ends on At this moment.
A practical answer is Chapter 34, because it turns the idea into a concrete scene. The chapter opens with Seeing that the public sentiment wasn't quite right, Su Yinwan felt..., adds pressure through Hurry up and start the live show, I can't wait to watch the universe's..., and ends on Now that.
Chapter 32 is the strongest chapter-level answer because it starts from You should know, an ID photo is like a mirror for demons. and follows through on With airflow comes water flow, and your fortune will naturally improve."....
If you want the clearest chapter reference, go to Chapter 46. Early on, Upon hearing this, everyone but Jiang Li perked up with high alert.; later, the chapter leans on After all, there were only a few who didn't care how others saw them..