Lit a would need to get some sleep because she will need to be rested and refreshed for the second 24 hr. shift
To be heathlyer and have more variety
I believe the answer would be Scribes
When talking about interpretting emotions it depends on how well you know the person. If they a "day-one negroid" then you could interpet all emotions. assuming your not fake. However if thy just sus negroid happiness would be the easiest. just look for a smile:) hope this helps!!! have a gr8 day.