Sybelle Glover is the wife of Robett Glover and a member of House Glover. Following the Ironborn capture of Deepwood Motte, she and her children Gawen and Erena Glover are thrown into prison by the Ironborn. Due to King Robb Stark's failure to come to the aid of House Glover, Robett refuses to assist his half-brother Jon Snow and sister Sansa Stark's efforts to retake Winterfell from House Bolton, who had helped them drive out the Ironborn earlier.