Fans of series pay not enough attention to Pinkamina's character, often creating from her a "dark" image of Pinkie Pie. And sometimes image of the maniac, murderer or psychopath. I consider that it is incorrect. Pinkamina - the gloomy antagonist, whose character deserves bigger attention.
Neither fans, nor a canon didn't pay the necessary attention to an image of the reaper, soul collector , in Equestria. The reaper is undoubtedly dark figure, but plays a vitalny role in existance of any fictional Universe. Being a cultural embodiment of death, the Reaper represent in habitual for inhabitants of this Universe shape. In MLP world such Reaper is Pinkamina.
This picture is drawn based on this story [link]
, where the author, paying much attention to development of the character of Pinkamina, develops a death and Reaper subject in MLP universe.