Emerald Sustrai

Emerald is an associate of Cinder and a possible partner for Mercury. She makes her first appearance at the end of Black and White in RWBY Volume 1.

Appearance
Emerald is a thin female with tan skin and dark-red eyes. Her hair is a light mint green cut with a straight fringe and bangs as well as two long locks on each side. She wears two bronze-colored rings on her middle fingers.

Originally, her attire consisted of an intricate, exotic-looking white top and olive undershirt along with white shorts decorated with what appears to be a gold coin-plated belt with four gold chains draping around her back from two of the coins and what seems to be a green loincloth.

She also wore a gold three-ring armband on her left arm and a string of gold beads near the same wrist. As of Volume 2, her outfit has changed somewhat. Her top has thinned, her undershirt is now shallow-cut, and her armband and beads seem to no longer be made from gold.

She now also wears white pants and brown chaps that end at her calves and an overlong belt, twice-wrapped, where she keeps her weapons. Her hair is also noticeably fuller and longer and her irises are wider.

History
In the post-credits scene for Volume 1, Emerald and Mercury are seen accompanying Cinder to a meeting with Roman Torchwick.

Some time later, Emerald watches from the stands as Mercury fights Pyrrha in a tournament at Beacon Academy. She sits with the other students and briefly interacts with Ruby, to whom she acts outwardly friendly.

Personality
Based only on the sneak peek of Mercury's fight with Pyrrha, which shows Emerald observing on the sidelines along with Ruby, she seems mostly aloof while exhibiting a pretense of politeness. This is shown as she mostly ignores Ruby until she looks directly at her, to which Emerald off-handedly smiles and subsequently rolls her eyes when Ruby looks away.

Skills and Abilities
Emerald uses a pair of firearms with jungle-green grips, each stored inside their own separate leather casings on a belt wrapped around Emerald's waist. In the Volume 2 Opening, they are shown to be pistols with long, curved blades, presumably with both melee and ranged functions, similar to Crescent Rose.

Trivia

 * Both Emerald and Mercury lacked 3D models in Volume One, and were simply shown as 2D image sprites instead.
 * Given her symbol and her overall Egyptian feel, she may be an allusion to Cleopatra.