Your descriptions, along with the story as a whole, should be in the same perspective you've been using up to that point. Do not change your perspective in the middle of a chapter. Actually, keep the story consistent with the perspective. If you've told the first five chapters in the first person, keep it in the first person.
So basically, if you're telling the story as an omniscient narrator, describe it as so. If it's been in Emile's persecutive, tell it from his POV.