Overview
Gyu Ryeon is a high-ranking administrator in the Serving Command Ark, the headquarters of the True Dragon Alliance in the Bright Cold Realm. She oversees the Emptiness Floor. She appears as a woman wearing a casual brown robe with long unkempt hair and small golden antlers. Her cheeks and arms are adorned with exposed yellow-brown scales.
History
She uses the excuse of helping Seo Eun-hyun assimilate his newly acquired True Blood to visit the Sea Dragon Palace and see Seo Hweol. Later, when they visit the demon tower, she uses the Vast Cold Oath to bind herself to Seo Hweol. She takes Seo Eun-hyun as her assistant to act as a liaison. This fails and Seo Hweol pushes them both into the Unknown Astral Realm along with Yu Hwa. This leads to her death.
Gyu Baek (Remnant)
Gyu Baek was the remnant left behind by the resentment inside Gyu Ryeon as she died. Seo Eun-hyun decides to teach her Martial Arts, specifically the Dragon Form Soaring Claw. She gets a job as a dancer. Eventually, Gyu Baek uses her Entering Heavens technique "Auspicious Exchange of Emotional Expression" on Seo Hweol. After learning his 'sincerity', she chooses to die rather than break the oath.