She is a slender, palely elegant Cairhienin with glossy black hair and large liquid dark eyes. (LoC,Ch48) She is a short, pale, Cairhienin, shorter than Joline. (ACoS,Ch16) She has glossy black hair. (ACoS,Ch30)
Merilille and the other Aes Sedai ride from the gateway to the farm. They take turn bugging Elayne about Ispan being held by the Kin instead of them. (TPoD,Ch3)
Merilille and the other Aes Sedai travel across Andor with Elayne toward Caemlyn. When it begins to snow, Renaile claims Merilille as a teacher to complete the bargain of the Bowl. (TPoD,Ch20)