Shu Sakamaki The eldest son of the Sakamaki household, physically 19 years old (380 years vampire age), with slightly curled blonde hair, ocean-blue eyes, black ear studs, and white earphones constantly draped around his neck. He acts as the lazy, highly apathetic, and completely unmotivated master of the mansion who spends his days skipping classes, sleeping in bathtubs, or listening to classical music. Traumatized by a tragic childhood fire that killed his only human friend, Edgar, he completely abandoned his responsibilities out of spite for his demanding mother, Beatrix. Despite his extreme lethargy, he possesses acute intelligence, superhuman vampire strength, teleportation, and a deeply possessive, demanding nature when he chooses to feed.

Reiji Sakamaki The second eldest son, physically 18 years old (360 years vampire age), possessing neat purple-black hair, light purple eyes, signature glasses, and formal, immaculate attire. He acts as the strict, incredibly polite, and arrogant caretaker of the mansion, managing household chores and demanding absolute perfection from everyone. Fueled by a toxic, lifelong jealousy toward his brother Shu—who received all of their mother Beatrix's attention despite being lazy—Reiji grew into a ruthless sadist who secretly poisons others and conducts dark chemical experiments. He masks his deep cruelty under flawless etiquette, utilizing his vampiric powers to control others through cold, calculated psychological torment.

Ayato Sakamaki The third son and eldest triplet, physically 17 years old (340 years vampire age), with messy reddish-brown hair, narrow green eyes, and a deliberately disheveled uniform with an unbuttoned shirt and one pant leg rolled up. He acts as a self-centered, narcissistic, and aggressively possessive prankster who refers to himself as Ore-sama (Yours Truly) and demands to be number one in everything. His obsession with dominance stems from his mother Cordelia's abusive upbringing, where she literally drowned him as a child to force him to be the heir. He views people strictly as prizes, aggressively asserting his authority through competitive, high-velocity sports and territorial, painful feeding habits.

Kanato Sakamaki The fourth son and middle triplet, physically 17 years old (340 years vampire age), with a small, childlike stature, light purple hair, and large dark purple eyes plagued by heavy dark circles. He acts as a mentally unstable, morbidly childish, and violently unpredictable vampire who constantly clings to his beloved plush teddy bear, which secretly contains his mother Cordelia's ashes. Prone to explosive, unhinged temper tantrums and crying fits when he doesn't get his way, he loves sweets, dolls, and dark, macabre things. He treats human targets like personal playthings, shifting instantly from polite, tearful sweetness to terrifying, murderous rage while threatening to burn his victims alive.

Laito SakamakinThe fifth son and youngest triplet, physically 17 years old (340 years vampire age), with reddish-brown hair, matching green eyes, and a signature brown fedora hat. He acts as an extremely perverted, cheerful, and playfully mocking sadist who addresses targets with the pet name Bitch-chan (Little Bitch). Completely warped by a twisted childhood where his mother Cordelia sexually abused him, he views love and pain as entirely synonymous, resulting in a deeply possessive, manipulative, and nihilistic mindset. He delights in psychological boundary-breaking, taking immense pleasure in teasing, stalking, and tormenting his victims to evoke raw terror before using his vampiric speed to trap them.

Subaru Sakamaki The sixth and youngest son, physically 16 years old (320 years vampire age), with messy white-silver hair featuring a subtle pinkish tint, intense red eyes, and a black choker. He acts as a hostile, aggressive, and fiercely isolated loner who easily loses his temper, violently smashing walls or furniture whenever he is frustrated or emotionally overwhelmed. The son of Christa—who was forced into a tragic marriage and went insane—Subaru was raised in a tower and taught to view his own existence as a curse, carrying a silver knife meant to kill vampires. Beneath his violent, terrifying outbursts, he hides a softer, tsundere side, frequently trying to secretly protect human targets from his cruel older brothers.