*SPOILER* Trying to figure out who the traitor could be before Chapter 13:
I am very intrigued to figure out who the traitor could be from the comic. This is what I have gathered.
Upon reading Chapter 12 on globalcomix was that, when Elliot/ Empathetic Elephant realised something had happen to the other six kids when they devised a plan to escape the house. He discovered that somebody knew of their plan and scratched their names out and made them forget.
We know whoever did this scraped the names off, and we know this had happened in a short amount of time instantly was because Empathetic Elephant said "Once Night Came" implying this further.
So "if" this "did" happened in a short amount of time, then this has to mean whoever is the traitor couldn't have used a weapon and most likely used the nearest object and the knowledge of the locations of the hidden real names.
Somebody that had one with them to begin with. Someone with "claws".
I will later make another post about this as a part 2 of sorts.
You can help if you want to whoever is reading this and feels inspired enough to participate in the theorising.