Hypnos was the exception among the otherwise callous gods of death. For, unlike Oneiros or Thanatos, he was the only one who did not inspire dread, and behind his intimidating mask was a face that was warm and kind. Similarly, the death that he bestowed upon others was more akin to a gentle sleep. It was when people were about to expend their last breath that he would appear, laying them bare of their fear and suffering.
In Greek mythology, Hypnos (Greek: Ὕπνος, "sleep") was the personification of sleep; the Roman equivalent was known as Somnus. Hypnos lived in a cave, next to his twin brother Thanatos (Θάνατος, "death personified") in the underworld. Hypnos' mother was Nyx (Νύξ, "Night"), the deity of Night, and his father was Erebus, the deity of Darkness. His wife, Pasithea, was one of the youngest of the Graces and the deity of hallucination or relaxation.
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