She was short, little and plump, always wearing a smile. She seemed to be bustling even while standing still.
In "The Wheel of Time Companion" Valera's level of strength is described as 14(2), putting her among the most influential sisters of her age.
Valera was 232 years old when she died. She was born in the year 748 NE and went to the Tower in 765 NE. After spending eight years as Novice and six as Accepted she was raised to the shawl in the year 779 NE. Her last name indicates that she was from Kandor.
Like all of Tamra Ospenya's searchers, she held onto the law with dedication and was presumably strict and orderly. She probably was also in a high position into Aes Sedai hierarchy by the fact that the searches chosen by Tamra were all in a relevant position into their respective Ajah.
It has been suggested that she, Aisha Raveneos and Ludice Daneen in accordance with Meilyn Arganya and Kerene Nagashi, also were strong in the One Power. Said speculation is based on the assumption that Tamra was not only looking for women strict and of great abidance, but also for those strong in the One Power.
As it is described above her strength level in "The Wheel of Time Companion" confirms this speculation.