She was tall and beautiful, with short dark hair and nearly black eyes. She was very strong in the Power, standing above Moiraine Damodred and Siuan Sanche but lower than Cadsuane Melaidhrin, making her one of the strongest channelers of the White Tower of her time. Cadsuane said that "no one had come to the Tower who could match [her] in a thousand years. No one to mach Kerene or Meilyn in almost six hundred." 
In the Wheel of Time Companion her strength level is described as 11(+2), confirming her rank.
She came from a home of rather modest character and had four siblings; two sisters and two brothers.