Just finished the Amber route. I was scared of her at first because of the warning but now, I feel like that warning was kind of a letdown. I thought it would HURT and I was kinda looking forward to that but currently, it's pretty tame compared to Cathryn and Naomi.
Her storyline is probably not finished but I don't think adding to it will do much. I can't get attached to her like the other two. Cathryn is a sweetheart that gets corroded overtime and Naomi is really lovey dovey with the MC but with skeletons in her closet. Amber, she doesn't have much going for her.