Hmm, interesting.
The question is, does Chaerin perceive her differently now because she's paying more attention to them?
Or because her actions have led to their assigned "role" in the Story changing?
I think the latter is whats happening. When she stopped caring about the original plot while she was dying over and over again trying to save the old ML, she also stopped being able to see him properly.
But in both cases now were her interactions with a side-character caused their behaviour or role to change, she was able to see them