|Holotome Profile: Quetzalcoatl|
|Special Ability||Can become the Blue Star|
|Users|| Lord Casterwill |
Elder daughter of Casterwill
|First Appearance||"The Titan in the Temple of Sun"|
Quetzalcoatl was the Titan of the elder daughter of Casterwill. Originally, the Amulet of this Titan was stored inside the Willblade. Pendragon's Amulet later took the place of that of Quetzalcoatl inside the Willblade, and Quetzalcoatl's Ring was sealed by itself in the Temple of Sun in Teotihuacan, Mexico.
In the Temple of Sun, Lok Lambert managed to awaken Quetzalcoatl when Den ignited the blue powder stored within the temple. The Titan then became the Blue Star to summon together the members of the Casterwill family against the Blood Spiral .
In Tír na nÓg, Lok's father Eathon told him that Pendragon might not be enough the defeat the Spiral and that Lok would require more. The Blue Star of Quetzalcoatl then briefly appeared. After heeding his father's words, Lok later managed to summon back Quetzalcoatl from the Blue Star form to use in battle against the Betrayer. After placing his Ring back in the Willblade, Lok was able to defeat Demigorgan, the Titan of Betrayal and destroy his Amulet for good. .
Like Pendragon, Quetzalcoatl can fire energy blasts from his mouth. Quetzalcoatl also is able to turn into lightning. When its Ring was placed in the Willblade, the Titan could create stronger energy blasts, powerful enough to destroy the Ring of Demigorgan. . In addition to flight capabilities, Quetzalcoatl is capable of transforming into the Blue Star to signal the Casterwill family members around the world to reunite.