Put simply, Psychopomp is actually the word for a person that guides souls so the Grim Reaper, Hermes, various angels in religions and myths, etc. are Psychopomps. Hades does the same but he also later judges the souls in the Underworld, but the job could also include outright killing an individual like Thanatos would so the term is broad range for any individual who deals with souls and leading/taking them to the afterlife.
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Put simply, Psychopomp is actually the word for a person that guides souls so the Grim Reaper, Hermes, various angels in religions and myths, etc. are Psychopomps. Hades does the same but he also later judges the souls in the Underworld, but the job could also include outright killing an individual like Thanatos would so the term is broad range for any individual who deals with souls and leading/taking them to the afterlife.