Hypnos

Hypnos is the embodiment of sleep. He is one of Nyx's many children, and the younger twin brother of Thanatos. He watches over the procession of newly-arrived shades coming before Hades, checking their names off his list. He is often seen sleeping on the job. He greets Zagreus most of the time when the prince is killed and returns to the House via the Pool of Styx, and often gives unhelpful advice and a quip about whichever enemy or natural force did Zagreus in. Hypnos returns in Hades II, but in a state of deep coma induced by sleep. One of Melinoë's missions is to wake him up.