Yona, Hak, Yoon and Kija arrive at the Village of Seiryuu, shown as a network of caves, where many villagers are seen wearing masks. Although the villagers deny about the blue dragon warrior being around, the four are granted to stay at the village overnight. While exploring the caves, Yona gets separated from the group, and she encounters a male villager, who takes her deeper into the caves. After the villager tries to harm Yona, she is rescued by the blue dragon warrior, who scares off the villager. When Yona catches up to her friends, the blue dragon warrior runs away. Eighteen years ago, the blue dragon warrior was born with the power of the blue dragon sealed in his eyes. Four years ago, he was feared by the other villagers, due to his power to paralyze those who look in his eyes. He was taught how to fight with a sword and how to control his power by his guardian Ao, who slowly became blind over time before dying.