Well, Annabeth would definitely be one. She's always been by Percy's side, and in this fanfiction, she might be a bit worried about Percy being the champion of Nyx. She could be trying to help him while also being cautious of Nyx's motives.
Grover could also be involved. He might be using his nature - sensing abilities to detect any threats to Percy that are related to Nyx's enemies. Grover could be the one to give Percy some advice on how to deal with the more otherworldly aspects of being Nyx's champion, like how to navigate the strange new powers or places that come with it.
Another character could be Nico. Since he has a lot of knowledge about the Underworld and the darker aspects of the Percy Jackson universe, he would be a great source of information for Percy. Nico might be initially skeptical of Percy's new role but would eventually come around to help him face any challenges that being the champion of Nyx brings.
Look to Chapter 40 for the clearest answer. It begins with [Jiang Li claims she copied this herself?, keeps building through But her calligraphy is actually this pretty?] [Jiang Li dares to boast,..., and lands on The handsome guys on this show are so difficult to deal with..
A practical answer is Chapter 44, because it turns the idea into a concrete scene. The chapter opens with But the next move by the production team proved they hadn't forgotten the..., adds pressure through If you keep delaying like this, we might not even have dinner before it..., and ends on Does.
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....
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."....
Look to Chapter 28 for the clearest answer. It begins with The next evening, Jiang Yan drove home seething with rage., keeps building through Before he even entered the dining room, he shouted angrily, "Lili, you did..., and lands on Lili then kicked his knee hard..
Chapter 808, "Dare to Spank Him?!", is the clearest early answer because it turns Jiang Buchen's situation into a concrete plot event. The chapter turns that into something concrete by moving from I don't listen, I don't listen," Jiang Bufan once again started his...
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 935, "Gu Pansheng's Grace [Extras: Protagonist's Edition]", is the clearest early answer because it turns Gu Yu's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I sat on the sofa, seriously saying, "Little sisters are so adorable.
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.