A wolfdog who was pet to the family of Quent Yaiden. After the destruction of his home and family in the village of Kyrios, she travels with Quent hunting wolves under the belief that they were responsible for the tragedy. She lives her life as a pet dog, unaware of her wolf bloodline. Upon meeting Cheza, the wolf in her is awakened. Unable to continue hunting her own kind, she leaves Quent to travel with the pack to Paradise. She grows especially close to Hige, and later tells him she will follow him wherever he goes, hinting that she may have developed feelings for him. Near the end of the series, after Quent's death, Blue is killed by Darcia while trying to protect Hige and Cheza.