Melpomic

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A melpomic headmate is a member of a system that holds purely negative thoughts or perceives the world as inherently negative, bad, and evil. A melpomic member might see everyone but themselves as bad, be distrustful of people, see life as a bad or negative thing, and not be able to see the positive in things. Melpomic members are often the counterparts to thailean members, but not always. Melpomic can be both a role and a descriptor for a member.

History
Melpomic’s name comes from Melpomene, the Greek muse of tragedy. The term is based off of black-and-white, or polarized thinking, where someone can only thing in absolutes with no grey area in between.

Related Terms
This may be considered a synonym to pessimist.