Most likely the main characters would be the Triwizard Tournament champions. So, it could be Cedric Diggory, Fleur Delacour, Viktor Krum, and of course, Harry Potter.
Aside from the champions, it's very possible that Harry's friends, Hermione Granger and Ron Weasley, play important roles. They often support Harry in his adventures and would likely be involved in this story about the third task. There might also be other Hogwarts students or professors who are important in the fanfic, like Dumbledore who always has a guiding presence in such events, or Snape who might be involved in some way related to the task, perhaps in providing potions or other magical aids.
It could also feature some original characters created by the fanfic author. These new characters might be students who have a special connection to the third task, either through a family connection to the Triwizard Tournament or some other unique backstory. They could add new layers of drama and interaction to the story of the third task at Hogwarts.
Chapter 159 is the strongest chapter-level answer because it starts from Seeing the red light of the camera turn on, Su Yinwan looked at the... and follows through on Shang Shaobai, who was browsing through files, received a call from his....
Chapter 158 is the strongest chapter-level answer because it starts from Reluctantly, Jiang Yan had no choice but to forcibly join the group for... and follows through on we're just very close friends." Sister Li had a vast number of followers....
Chapter 185 is the strongest chapter-level answer because it starts from He was so anxious that he immediately picked up the megaphone. and follows through on The next, she'd complain that the ground was too slippery to walk on..
If you want the clearest chapter reference, go to Chapter 106. Early on, Thinking of this, He Yun nodded with a hint of anticipation.; later, the chapter leans on Alright, then tell me my fortune, what do I need to do?.
The best chapter pointer here is Chapter 178, "The Group's Favorite Belongs to No One but Her!". It opens with Wen Jiaojiao is just too unreasonable, why does she have to single out... and closes on Let's not even mention President Shang's own net worth, but talk about his....
Look to Chapter 133 for the clearest answer. It begins with Watching Jiang Li and the others finish their meal and tidy up the table,..., keeps building through But when he went to the firewood shed to find a convenient wooden tub, he..., and lands on It was only after she shared the concept and.
The best chapter pointer here is Chapter 123, "Can This Even Be Calculated?!". It opens with After He Yun also carefully rolled up her trouser legs and walked down... and closes on Seeing this, He Yun chuckled softly to himself, then glanced at his own....
A practical answer is Chapter 123, because it turns the idea into a concrete scene. The chapter opens with After He Yun also carefully rolled up her trouser legs and walked down..., adds pressure through Master Jiang is awesome!!!] [Those who said Sister Li had insider help can..., and ends on.
A practical answer is Chapter 120, because it turns the idea into a concrete scene. The chapter opens with Facing the sudden and somewhat strange request from Jiang Li, Director Sun..., adds pressure through Netizen: Wen Jiaojiao had been acting for years without much fame, but now..., and ends on.
Look to Chapter 125 for the clearest answer. It begins with Next, it was Qi Tianyu's turn., keeps building through Although he didn't know what Jiang Li had chosen, just from her recent..., and lands on He deliberately chose the most inconspicuous wheat seeds..