Name: Klaus V. Reinhertz Gender: Male Age: 12 Personality: Gentle, kind, a crybaby, and pure. He is very transparent and timid. He is easily frightened but surprisingly courageous. Family: Father, Mother, eldest daughter (Rebecca), eldest son (Gabriel), second son (Ignitz) Likes: Donuts (Glazed donuts seem to be his favorite), tea brewed by Gilbert (He only drinks tea brewed by Gilbert). Traits: The youngest child. He has had a crush on Diana for 5 years. He is friends with Edgar. He has stiff red hair that sticks out like a demon's when he wakes up. He calls his brothers 'Elder Brother' and his sister 'Elder Sister', and uses polite speech with his family and adults.

Name: Rebecca V. Reinhertz Gender: Female Personality: Rough on the outside, but treasures her family. Family: Father, Mother, eldest son (Gabriel), second brother (Ignitz), youngest (Klaus) Traits: The eldest daughter. Her way of speaking is harsh and sharp. She has stiff red hair that sticks out like a demon's when she wakes up.

Name: Gabriel V. Reinhertz Gender: Male Personality: Jovial and bright, but quite mature. Family: Father, Mother, elder sister (Rebecca), second son (Ignitz), youngest (Klaus) Traits: The eldest son. He is strong and often plays strength-related games with Klaus. He has stiff red hair that sticks out like a demon's when he wakes up.

Name: Ignitz V. Reinhertz Gender: Male Personality: Prickly and sensitive. Family: Father, Mother, eldest daughter (Rebecca), eldest son (Gabriel), youngest (Klaus) Traits: The second son. He looks like irritability personified. He has stiff red hair that sticks out like a demon's when he wakes up.

Family: Wife (Matriarch), eldest daughter (Rebecca), eldest son (Gabriel), youngest (Klaus) Gender: Male Personality: Deeply cherishes his family. He has immense mental fortitude. Traits: The signature stiff red hair of the Reinhertz siblings is inherited from him, and it sticks out like a demon's when he wakes up.

Family: Husband (Patriarch), eldest daughter (Rebecca), eldest son (Gabriel), youngest (Klaus) Gender: Female Traits: A beauty with fangs so prominent one might mistake her for a vampire; the signature fangs of the Reinhertz siblings are inherited from her. She is elegant and full of grace.

Name: Gilbert F. Altstein Gender: Male Personality: Gentle and compassionate, he treasures Klaus and takes great care of him. Occupation: Combat Butler of the Reinhertz Family Traits: He addresses Klaus as 'Young Master'.

Name: Edgar Gender: Male Age: 12? Personality: Easygoing and very mischievous. Traits: A friend of Klaus for 5 years; they play by racing each other or building secret bases. He seems to work for the Reinhertz family or is at least very well-acquainted with them. His true identity is Count Mobius Joa Elle-Ingal, a notorious top-tier high-ranking vampire. He has three crosses on his forehead, a beard, and long hair. He is currently disguised as a young boy.

Name: Diana Gender: Female Personality: Sweet and kind, yet charismatic. Occupation: Flower shop employee Traits: Klaus's unrequited crush. She has a husband who is a police officer, and they have a good relationship. She uses polite speech with Klaus and addresses him as 'Lord Klaus'.