Surial is a Maiden of the Spear guarding Rand at Tellaen's manor. She disagrees with Lerian that Rand should be beaten (TGS, Ch. 11). She and Lerian later guard Min while Rand is absent from the Stone of Tear (ToM, Ch. 12).
"The previous meeting did not see to do any good. He accepted it like a man, not a child, but did not change his actions"
(Reference: The Gathering Storm, Chapter 11)