"Psychopomp: a guide of souls to the place of the dead. Also, the spiritual guide of a living person's soul." (from the Oxford American Dictionary)
I just finished Kazuo Ishiguro's grim little tale Never Let Me Go and seeing psychopomp in the dictionary made me think of it. Let's just say the word completed stays with you a long time after reading this book (and not in a good way). It's a fascinating story, but profoundly sad.