Valinde is described as stout.
Valinde is not very strong in the One Power. Her level of strength is described by "The Wheel of Time Companion" as 33(21) which is an intermediate level in Aes Sedai hierarchy. With this level of strength she is unable to open alone a suitable gateway to Travel.
She is part of the group of Aes Sedai who demand that Rand lift the restrictions he had placed on them. When he refuses, the Aes Sedai leave in a huff.