A beautiful boy with blue-tinted black hair and vivid blue eyes. He has a unique hairstyle with only the back grown out into a long tail. His appearance is somewhat androgynous and slender. He wears a flowing black coat and vest, with various items including the Book of Vanitas hidden inside the coat. He also wears black gloves with sharp claws and avoids revealing his right arm unless absolutely necessary, as it bears the mark left by the Vampire of the Blue Moon.

He is an 'ordinary human' who can wield the Book of Vanitas using the power inherited from the Vampire of the Blue Moon, and he calls himself a 'Vampire Specialist' who seeks to save vampires with that power and the book. Although he has a different birth name, he uses the name Vanitas after inheriting the power. He used to act alone frequently, but since becoming involved with Noé, he acts as his partner.

He is usually very cheeky and rude in his speech and behavior. No matter who he is talking to, he never shrinks back, maintains the upper hand, and possesses a cunning side. However, beneath this arrogant exterior, he is actually quite attentive. While he seems indifferent to his surroundings, he hates it when others are put in danger because of him, and he possesses an inorganic personality that doesn't care how much he himself is endangered or hurt for the sake of his goals.

"I will do as I please, using the method I choose, regardless of your will! I will definitely save you vampires!"

A handsome young vampire with brown skin, silver hair, and purple eyes. His brown skin and light hair are said to be characteristic of the bloodline he was born into.

He is usually a polite character who uses respectful and gentlemanly speech. In his childhood, he spoke like an ordinary boy, but his language becomes very rough when he is angry. Having lived in a rural village called Aveyron, this is his first time in a big city like Paris, so he finds everything in Paris fascinating. He often shows a clumsy side despite his poker face or has his eyes sparkle like a child.

When he gets angry, he can go quite overboard and occasionally performs eccentric acts.

His full name is Noé Archiviste, but his true name is still uncertain. In his childhood, he loved blood as much as the snack 'Tarte Tatin,' but he stopped after being traumatized by a childhood friend who called him a monster for looking into their memories without permission. However, since the Archiviste's ability is limited to seeing memories only during the first time they drink from a subject, he does not see the memories of those he has already fed from multiple times.

A great beauty with pinkish-silver hair and golden eyes. She is a vampire.

She serves Luca as her master, and her body reacts immediately if she discovers anything that might harm him. She is strong even without weapons, but she usually uses a wearable weapon called the 'Crimson Gauntlet (Carpe Diem)' which she carries as luggage.

She was originally Lord Ruthven's 'Bourreau (Executioner)' and is a vampire known by the alias 'Hellfire Witch,' a kin-slayer given the name of a saint. Given the alias Hellfire and the mention of using fire, it seems she doesn't just engage in physical combat but also has the supernatural ability to manipulate fire. She is famous for single-handedly annihilating over a thousand vampires who betrayed their kind and sided with humans during the past war between humans and vampires. Her combat power is extremely high, but she is currently restraining her strength due to Luca's orders. She seems to have lived for quite a long time, but among vampires, she is still treated as a youngster.

A stunning beauty with purplish-black hair and golden eyes. She is a vampire and Noé's childhood friend.

Her usual personality is sly, and she even flirts with other women to the point of yuri-like portrayals. In the past, she had a shy personality, but after her older brother Louis de Sade died, her speech changed to resemble his, and her bangs were altered to look more like Louis's.

She seems to have experience providing blood to Noé since they were young, and she does not reject it. Rather, she expresses her affection quite actively, such as suggesting he drink her blood first or saying she will give all her blood to Noé. From her perspective, she has liked Noé since they first met, but he is a frustrating male friend who hasn't noticed her feelings for over ten years.

However, perhaps because she also cherishes him as a friend, she hasn't tried to cross the line further and hasn't conveyed her feelings. Yet, being human, she still wants him to know, so she sometimes drinks his blood as a way to vent her frustration at the incredibly dense Noé.

She seems to have gained the favor of Jeanne, whom she treated kindly, and sees Jeanne following her sincerely. Dominique herself seems to like Jeanne and finds her quite cute. However, she also gets jealous knowing that Noé is paying attention to Jeanne. Although she is called an executioner, she shows an indifferent attitude, saying nothing is more important than adoring a beautiful flower.