There are so many moments in Wolf 359 where the 'missing information' of the audio-only medium is used to add to the impact of a scene. But a particularly emotionally devastating one for me is when Eiffel tells Minkowski "No, don't make that face, it was… it was the only way" after she learns that he's about to lose his memories in the finale. Because we don't see "that face". We don't know exactly what expressions Eiffel is reacting to there. Was her mouth open in horror? Were her eyes wide in shock? Did her brow furrow with worry? Was there despair in her expression, or anger, or disbelief? We don't see it, and so for the listener, this moment contains all of those possibilities. All we know for sure is that Minkowski heard that Eiffel was going to lose his memories and the expression on her face was not one Eiffel wanted her to make. And to me, that's more powerful than the relative certainty of seeing her expression.