psychopomp (n.)

"guide or conductor of spirits or souls to the other world," 1835, from Greek psykhopompos "spirit-guide," a term applied to Charon, Hermes Trismegistos, Apollo, etc.; from psykhē "the soul, mind, spirit" (see psyche) + pompos "guide, conductor, escort, messenger," from pempein "to send, dispatch, guide, accompany," which is of unknown origin. "The verb has no IE etymology, nor does it show characteristics of loanwords or Pre-Greek vocabulary" [Beekes].