Louis de Pointe du Lac serves as both the protagonist and narrator of the novel, framing the entire story through his first-person account. As a mortal, Louis is consumed by grief and guilt after the death of his brother––a loss that leads him to embrace death in the form of vampirism. But once he has turned, Louis becomes a paradox: a vampire who longs for morality and mourns his lost humanity. His internal conflict is pivotal to the story, as he frequently resists his hunger to feed on humans and clings to ideas like love, goodness, and truth. He views evil in absolute terms—seeing it as all or nothing—while acknowledging that goodness exists on a spectrum and is shaped by human morality. He only feeds on animals or those he believes are morally corrupt in order to ease his guilt about taking lives, and he avoids creating other vampires out of fear of causing pain.

Louis’s relationships shape his journey, both as a mortal and as a vampire. He uses his parental role with Claudia as a way to give his undead life meaning, and also uses their bond to distract himself from his own violent urges. His relationship with Lestat is marked by toxicity, desire, and Louis’s deepest fears. Where Lestat displays a nihilistic outlook on life, Louis is driven by existential questions and behaviors. He questions God’s existence with Armand and seeks companionship with him, but cannot bring himself to accept Armand's dark worldview. And he continues to search for meaning in his suffering and peace in his immortality, but he can find neither, and his isolation continues to deepen.

Unlike other vampires, Louis retains a strong capacity for introspection and moral judgment, characteristics that isolate him from his peers. Whether mortal or immortal, Louis cannot escape his existential dread. Even in the present interview, he is unfulfilled, and telling his life story is not cathartic, but rather feels like a final attempt to earn empathy from someone. He fails to see that he has lived an extraordinary life, even when the interviewer assures him that he has. His relationships serve only as temporary distractions from his deeper suffering: an internal hatred he carries for himself and his life as a vampire.