Tyrygosa (also spelled Tyrigosa) is one of the few remaining members of the blue dragonflight and suitor to Kalecgos. When taking humanoid guise she has refused to take the form of a human, finding elves more aesthetically pleasing, and seem to prefer not to meddle in the affairs of mortals. Her alias is Tyri, possibly either a nickname given to her by Kalec or a name she goes by when in disguise.
Kalecgos was sent by Malygos to Lordaeron on a mission for the blue flight. Worried about her future mate, Tyrygosa followed, arriving just in time to rescue Kalecgos from the undead Scourge. They were joined by the human paladin Jorad Mace and a strange young woman by the name of Anveena Teague. The four journeyed together for a while, their exploits eventually leading them to the land of Quel'thalas where after being assaulted by the traitor Dar'Khan Drathir and an enslaved Korialstrasz they discovered Anveena was the new avatar of the Sunwell. With the assistance of Sylvannas Windrunner Dar'khan was defeated and Anveena was left in the care of Lor'themar Theron and Halduron Brightwing. Kalecgos, having sworn to look after her, remained in Quel'thalas as Anveena's guardian. Tyrygosa departed, along with Jorad Mace, after wishing her beloved farewell.
Sometime after the reopening of the dark portal and the blue dragonflight's battle with the nether dragons attempting to come through, Tyrygosa traveled to Outland, along with Jorad Mace, to study the mysterious flight of dragons. At one point she took control of a brood with the help of adventurers at the Celestial Ridge in Netherstorm.
The dragon's Nether-warped physiology began to affect the Spell-Weaver himself, ultimately helping him regain some of his lost sanity. With his sanity restored to him, Tyrygosa's patron declared war on mortal spellcasters, sending his flight out to do his bidding. Tyrygosa's involvement (or uninvolvement) in the Nexus War has yet to be seen.
Tyrygosa, in the disguise of Tyri, can be seen in The Burning Crusade at Celestial Ridge in Netherstorm, along with Jorad Mace. She is involved in the investigation of nether dragons in the area. After asking adventurers to assist her by defeating the dominant Netherdragon in the area, Veraku, she takes control of the brood, planning to keep them safe and in check.