Shin Yoosung (41st round)

She is characterized by deep ruefulness, aggression, and intense emotional trauma. While she initially displays fierce loyalty to her original party members, the loss of her comrades and her long isolation turned her resentment toward Yoo Joonghyuk into a burning desire for vengeance. She struggles with feelings of betrayal, particularly upon seeing the 3rd regression Yoo Joonghyuk show care for his new companion, Kim Dokja, which stands in stark contrast to the cold detachment she experienced in her own timeline.

As the Disaster of Floods, she has pale skin and white hair, with her body covered in thick white fur that functions as a protective pelt. When influenced by the influence of Paul, she is surrounded by a dark, malicious aura. She generally maintains a somber and hardened expression that reflects the thousands of years of weariness she accumulated.

In the 41st regression, Shin Yoosung was the last surviving member of Yoo Joonghyuk's party. Tasked by an indifferent Yoo Joonghyuk to travel through time and across timelines, she endured thousands of years of isolation and suffering to provide him with information to succeed in earlier regressions. She eventually crossed into the 2nd regression, aiding Yoo Joonghyuk before presumably dying. As the Disaster of Floods in the 3rd regression, she confronts the current Yoo Joonghyuk, consumed by the trauma of her past betrayal and the agony of her long, lonely journey through the scenarios.