Thing is, if Yuri says outright that one of the humans aboard is (in effect) a pathological liar, Yuri will probably be accused of being a gnosia making an inept attempt to sow dissent. It might not even be the ACF making that accusation, because it’s such an outlandish thing to say. If Yuri is voted out, then they’ve failed Yuriko’s test.

As for Kukrushka, if she really is the Guardian Angel (there’s nothing that says she isn’t the ACF and lying about the other, technically), she might have chosen to protect Jonas on the first round, due to emotional attachment or something—we still don’t know what’s going on with those two.