"Oh."
No wonder he couldn't remember any mention of Treyton's so-called first love but had the feeling that he had read the name Frey.
So, he asked Treyton about the name of Frey's lover to see if there's any connection.
After hearing the name Russell, Luciel finally remembered who those two people were.
Russell and Frey were considered to be minor characters in the book.
Russell was the only son of a very wealthy family before the apocalypse, so it was understandable that Frey was more willing to be together with that person because the benefits were better compared to Treyton's military family.
Frey is a person who was good at getting benefits for himself and knew how to use the people around him to get the things he wanted.
Frey successfully got together with Russell while using Treyton's name, but when he got together with Russell, it wasn't as good as he thought.