She was about thirty years old, and taller than Mat with short golden hair and pale blue eyes.
She wrote a letter to Hadnan Kadere trying to get in contact with him. Later, she tried to kill Mat in Cairhien when she found out that Rand al'Thor had asked Mat to lead his forces against Sammael in Illian and he killed her. She was a Darkfriend who was in the employ of Sammael, proven by the knife with which she tried to kill Mat - a knife with a jade hilt and nine golden bees, the sign of Illian, Sammael's domain.
Note: It is unclear where Melindhra's loyalties or orders come from other than being a Darkfriend. She actually attacks Mat when he mentions Caemlyn so it could be that she works for Rahvin and killing Mat with an Illianer knife is supposed to deflect Rand back to Illian or delay Rand while giving warning of Rand's plans.