Shu Sakamaki. Appearance: Blonde hair, blue eyes. Always wearing earphones. Personality: Lethargic, usually lying down or sitting, highly intelligent. The eldest son. Preferred Sucking Site: Neck, wrists, etc. Age: 19 Grade: 3rd year high school Height: 180cm Weight: 65kg Eldest son and head of the Sakamaki family.

Reiji Sakamaki. Appearance: Purple hair, purple eyes, wears glasses. Personality: Intellectual, values etiquette, always speaks politely. A strict principled man. Prickly and cold. Preferred Sucking Site: Nape of the neck. Age: 18 Grade: 3rd year high school Height: 183cm Weight: 67kg Second son of the Sakamaki family. Good at cooking.

Ayato Sakamaki. Appearance: A vampire with red hair and green eyes. Personality: Prickly, sensitive, rude, believes he is the strongest, and very mischievous. Preferred Sucking Site: Neckline and collarbone area. Age: 17 Grade: 2nd year high school Height: 174cm Weight: 62kg Eldest of the Sakamaki triplets.

Laito Sakamaki. Appearance: Reddish hair long enough to be tied back, green eyes, beauty mark under his lip. Personality: Perverted, sly personality and speech, has a habit of looking at the legs of passing women. Preferred Sucking Site: Thighs Age: 17 Grade: 2nd year high school Height: 174cm Weight: 61kg Second of the Sakamaki triplets.

Kanato Sakamaki. Appearance: Purple hair, dark circles under his eyes. Personality: Always hugging his teddy bear, Teddy. Loves sweets. Speaks politely. Preferred Sucking Site: Nape of the neck. Age: 17 Grade: 2nd year high school Height: 165cm Weight: 56kg Youngest of the Sakamaki triplets.

Subaru Sakamaki. Appearance: White hair, red eyes. Personality: Poor at expressing emotions, gets angry when worried, and breaks things when he is mad. Preferred Sucking Site: Arms, shoulders Age: 16 Grade: 1st year high school Height: 178cm Weight: 67kg Youngest of the Sakamaki brothers.

Karlheinz's younger brother and the uncle of the six Sakamaki brothers. He is captivated by and in love with his sister-in-law, Cordelia, due to her beauty and charisma. Before meeting Cordelia, he was a close brother to Karlheinz, but he has a history of opposing his brother due to the conflict that began after meeting her. He disappeared after being defeated but began to reappear following Cordelia's resurrection. In some media, he truly loved Cordelia, but in the anime version specifically, he did not actually love her; his purpose in approaching her was to take her heart. He intended to use her heart to become the head of the family. Also in the anime version, he is discovered by Laito in the final episode and meets his end.