Tryse hitting that point of being too scared to admit what she's done, wanting to be praised for what she's done, and also not wanting to brag about what she's done.
If she looks weak to people outside Robin's Egg, they'll think Egg is weak. If she looks weak to Robin's Egg... well, they love her because she's steadfast and reliable and useful. And she likes being seen that way, even if she thinks knows it's wrong. So no looking as scared and worn out as she feels.
The biggest defining moment of her life was being locked in a hut and having to hide while her owner/teacher/mother figure was tortured to death outside, and after the scavenger hunt and the hostage game, she feels like she's being punched in that trauma over and over by the cult, so she's constantly operating more out of fear than anything else.
But she also doesn't want to look weak.
thinksknows it's wrong. So no looking as scared and worn out as she feels.