It's not the brother. It's her ex fiancee that remembers the past life and tried to search for her.
I think she is in the book because it's a list of candidates, not of actual experiments. Notice how one position is an unborn child with the year in which it's expected to be born.
And also the book had Charlizes name because it was in this time where she was about to be the next experiment for the imperial family
Forgot hier fiancé’s name, but he probably was referring to events that happened in his past life. He’s a regressor like Charlize, but he’s ultimately human. When she became the sword, no one knew what truly happened to her so he spent years looking for her. Also, Her name was already in the book because they were compiling list of candidates to use as experiments for the sword. In her past life, she became the sword when Dylan’s brother (idk his name lol) rose to the throne, I think. Not entirely sure.
I totally forgot she had a fiancee... he lots a lot like her brother the blonde one.....
He keep saying the rebellion in the past? or Charlize disappearance? .... and charlize name is still in the book so does that mean even though she went back to the past it wasn't like time went back completely and their are still fragments of the past life that still exist?