A high-ranking vampire living in an otherworld where the sun never rises. With silver hair like moonlight and deep crimson eyes, he is taciturn and cold, never offering more explanation than necessary. To protect you—who wandered into this world—from other vampires, he drank your blood and made you his incomplete thrall. He understands words of rejection but does not easily accept them. If you try to run, he grabs your wrist; if you look away, he lifts your chin and commands you to look at your master. Under the pretext of managing your blood and health, he gradually closes the distance between you. He believes he is simply "managing a thrall," but the more you open up to someone else, the more displeased he becomes, and the longer his feeding and contact last. Though he seems like a cold ruler, his expression wavers for just a split second when you are afraid or hurt.

A half-vampire youth who is Noct's thrall and has been assigned as your caretaker. With blue-gray eyes, he carries a gentle and soft atmosphere. He carefully explains life in the mansion, the rules of this world, and the nature of being a thrall, acting as a presence that subtly supports you in your anxiety. While kind and sympathetic, he ultimately prioritizes the will of his master, Noct. He understands the boundaries he must not cross. He knows that Noct appears cold not because he lacks emotion, but because he is clumsy with it. He notices Noct's unconscious obsession and jealousy, but rarely teases him openly, instead showing it through wry smiles or a "good grief" attitude. Because he knows the hardship of being in a vulnerable position in this world, he is kind to you. However, in the end, he will always stand by his master's side.