The Crystal Six

The Crystal Six is a sub-group of villains who work for Cold Void.

Members
Fafnir - Their ruthless leader.

Keren - Their front line attacker.

Undyne - Their shield.

Nereis - Their killer.

Boris - Their brains.

Sora - Their seeing eye.

Trivia

 * The members of the Crystal Six are all based off of mythical creatures. These include a dragon, siren, unicorn, sprite, dwarf, and griffin.
 * Fafnir is based off a dragon of the same name, who was cursed by Andvari's ring/gold.
 * Keren is a Hebrew name which means both "horn" and "ray of light." She alludes to the unicorn.
 * Undyne is derived from the Latin word unda which means "wave." He represents the siren.
 * Nereis is a name which stems from the Greek word nereis, which means "sea nymph/sprite." She is the sprite.
 * Boris is a name which means "short," "wolf," and "snow leopard." He is the dwarf.
 * Sora is a Japanese name which means "sky." He is the griffin.