The Bluebloods are renowned for their devotion to the Three-Faced Goddess, and this piety is an integral part of life in the Blueblood Witch Clan. They are somewhat reclusive and spend much of their time performing rituals in honor of their deity. Only the blood of specific types of humans, such as virgins, may be drunk by Bluebloods.
The Blueblood Matron wears a band of barbed iron stars across her forehead. This is because the Bluebloods reportedly have such strong ties to magic and the Three-Faced Goddess that the Blueblood Matron needs more iron and pain than most witches to keep her anchored to this world. In place of the iron crown, the Blueblood heir dons a leather band instead. By tradition, the Matron's robes are deep blue. The blueblood matron also represents the maiden aspect of the Three-Faced Goddess, and therefore will always be a relatively young witch.
Five centuries ago, the Blueblood witches had a vision of the Witch Kingdom under Ironteeth rule. They were the ones that mustered the Clans to fight against the Crochans, thus forming the Ironteeth Alliance.
- Their fierce religious dedication sometimes presents itself as arrogance. For instance, in Heir of Fire, Manon remarks with disdain that the Bluebloods arrived at the Omega first and claimed the highest rooms "because they needed the mountain breeze to complete their rituals." Mother Blackbeak calls the Bluebloods "religious fanatics with their noses in the wind"
- Manon, in Heir of Fire remarks that the Blueblood are the deadliest of the Ironteeth witches. Though they have look depth and calmness on their face they prove dangreous due to thier stong connnection with magic and stealth.