Didn't she primarily go so she could watch how the sacrifices go down?? What's the point of being there (aside from giving Adrian emotional support) if she's just gonna stand outside the room?
I would think looking at the aftermath rather than the process is less…traumatising, cause you gotta witness the struggle, then the killing blow, then the twitches from the body as the eyes slowly lose their light, then going limp, and all the blood, and the smell of blood, and his face while doing the act.
But then again, you are correct, and I do wonder if there will be an explanation next chapter.
And I do miss the chibi versions running around, hope I can see them soon!