Bartol is a Warder.
Erian reports to Galina Casban that Bartol and Rashan are suffering from her other Warders' deaths worse than she is. She comforts them in their grief.
Erian feels Bartol and Rashan Travel suddenly from Cairhien in steps towards where she is staying in Tear. They are Traveling with Logain Ablar and Toveine Gazal, who are using the Warder bond to locate their Aes Sedai so that Logain may contact the Dragon Reborn.