Wu Yue (internal)/Lin Xiaoyu (external, partially internal): The ancient queen's decisiveness and knowledge of intrigues constantly collide with the modern girl's kindness, cowardice, and longing for the ordinary. Later, they gradually merged into independent and powerful new individuals.
Su Qinghan: The daughter of a top financial group, both beautiful and intelligent, and ambitious. Due to family interests and Gu Beichen's attention, he developed a strong interest and hostility towards "Lin Xiaoyu", and first suspected that his identity was abnormal. He also carries family secrets.
Zhao Ling'er: An optimistic and cheerful archeology graduate student with a sense of justice. She is Lin Xiaoyu's (original) senior sister and only friend. Accidentally breaking into the secret of "Lin Xiaoyu", from shock to acceptance, and using professional knowledge to become an important bridge and ally for Wu Yue to understand the modern world and historical origins.
Gu Beichen: Technology upstart, CEO of Beichen Technology. Rational first, cold and distant, possessing strong insight and logical thinking. Attracted by "Lin Xiaoyu's" sudden and completely different words and deeds, he initially explored and gradually became deeply involved.
Qin Feng: A young history professor and a rising academic star. Gentle and elegant, knowledgeable, with in-depth research on ancient civilizations and mysterious phenomena. He can keenly sense the "aura" and wisdom of "Lin Xiaoyu" that does not belong to this era, and has a strong curiosity and desire for protection.
