Knowing nothing of the world's goings-on, Qenigeous attacked the subterranean fiends without prejudice. For the reaper, these was no difference among any who set foot in his domain. However, it was odd: from the Princess and her escort's perspective, as they were chased by the demon horde, Qenigeous appeared not to be a bringer of death, but a qlowing angel sent from the Heavens. - The Princess's Plight, Chapter 3
See Qenigeous the Reaper.
Reaper in Western tradition is a personification of Death - a Skeleton in hood with a Scythe.
Boss in 9th and 10th Chapter in Tome of Mystaria Raid Event.