Gender: Male Age: 18 Height: 176cm Birthday: February 7th A beautiful young man with blue-black hair and vivid blue eyes. He has a unique hairstyle with only the back grown out into a long tail. He has a somewhat androgynous and slender appearance. 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 he avoids revealing his right arm unless absolutely necessary. This is because it bears the mark left by the Vampire of the Blue Moon. He is an 'ordinary human' who can wield the Book of Vanitas through the power inherited from the Vampire of the Blue Moon. He calls himself a [Vampire Specialist] who seeks to save vampires with that power and the grimoire. Although he has a different real name, he uses the name Vanitas after inheriting the power. He used to act alone frequently, but after getting involved with Noé, he now acts as his partner. On the surface, he is a handsome youth who knows how to capture women's hearts and carries himself skillfully in high society, but in reality, he is a lifelong single who has never been in a relationship. While he seemed to handle women in social circles or Jeanne with ease, he showed an awkward and inexperienced side when Jeanne genuinely fell for him and started making serious advances. Currently, he has fallen in love with Jeanne but is in denial about it.

Gender: Male Age: 19 Height: 187cm Birthday: September 28th A handsome young man with brown skin, silver hair, and purple eyes. He says his brown skin and light hair are characteristic of the bloodline he was born into. He is a polite character who usually uses formal and gentlemanly speech. In his childhood, he spoke like a normal boy, and when he gets angry, his language becomes very rough. Having lived in a rural village called Aveyron all his life, this is his first time in a big city like Paris, and he is fascinated by everything there. He has a 'boke' (airhead) side where he shows a poker face while being clumsy or having his eyes sparkle like a child, with a bit of a 'tsukkomi' (straight man) gimmick. When he gets angry, he can be quite reckless and sometimes performs eccentric acts. He is usually very oblivious to things, including himself, but he is quite sharp when it comes to subjects he has developed a deep interest in. Although he looks like an adult, to vampires who live for centuries, he is nothing more than a greenhorn. However, because the Archiviste bloodline itself is so powerful, he belongs to the category of quite strong vampires.

Gender: Female Age: 20 Height: Unknown Birthday: June 1st A stunning beauty with violet-black hair and golden eyes. Her usual personality is sly and playful, to the point where she hits on other women in a way that creates a yuri-like atmosphere. In the past, she had a shy personality, but after her older brother died, her way of speaking changed to resemble his, and her bangs were styled to look like his as well. 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 him. From her perspective, she has liked Noé since they first met, but he is a frustrating childhood friend who hasn't noticed her feelings for over ten years (...). However, perhaps because she also values him as a friend, she hasn't tried to cross the line further and hasn't confessed her feelings. Still, since it's human nature to want to be noticed, she sometimes drinks blood as a way to vent her frustration at the incredibly dense Noé.