The Grim Reaper

The Grim Reaper' appears when Mitsu prays at a passage shrine or enters a place too high-level for him. When it appears, the reaper will constantly chase Mitsu and dash occasionally. The only way to get rid of the Grim Reaper is to either die, teleport out, or go to the next floor (although the Grim Reaper will appear there as well).

It also appears whenever Mitsu dies, giving a rather snark interpretation of how Mitsu died. The Reaper can also be summoned by praying at a passage shrine.

The Grim Reaper cannot be killed or stunned by kunai. Dodge it at all costs!

While it chases you, the Reaper will say things from a list depending on the location.

He will give a message on finally killing the player as well consisting of:
 * typical evil laugh
 * "NOOB!"
 * "Dramatic exit!"