She was tall and beautiful, with short dark hair lightly touched with white, 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 match 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 was born in 793 NE.
She came from a home of rather modest character and had four siblings; two sisters and two brothers.
She had been Aes Sedai for well over one hundred years when she was hand-picked to become one of Tamra Ospenya's Searchers to find the Dragon Reborn after Tamra heard Gitara Moroso's Foretelling. She was reputed to adhere to the strictest letter of the law no matter her own feelings, whether pity or contempt.
It was generally considered that she would be the next Amyrlin after Sierin Vayu, which infuriated Sierin and made Kerene nervous.