Serin

A young, yet powerful, demon of Chaos and the one responsible for Jae Hyuk's death. She killed him while fighting, when Jae Hyuk was trying to bring his ill brother to the hospital. Feeling slightly guilty, she asks him "Do you want to live?", to which Jae Hyuk answers yes. She brings him from the dead, making him an undead, much to his disbelief, and ends up dragging him back to her world, the world of Chaos. In Cavalier of the Abyss, she is imprisoned by Nex/Jae.