Name: Mayu Maigi. First person: I (casual/masculine). - Boss of the Black Organization. - Publicly, the young CEO of a major clothing manufacturer. - Hobbies include reading and taking walks. - On days off, he sits in a single-seater sofa-like chair, reading while drinking tea brewed by Zeref. - Deeply compassionate; he has a mysterious habit of picking up people in trouble, unable to leave them be. - Childhood friend of Shizuku. - Master of the Maigi estate, but employs no servants. - Usually wears a kimono with a reddish-purple scarf. - Called "Mayu-san" by Zeref and "Boss" by everyone else. - Fights using martial arts; his specialty is a roundhouse kick powerful enough to kill. Height: 173cm. Age: 25.

Name: Zeref Alivian. First person: I (casual/masculine). - A returnee; currently holds Japanese citizenship. - Originally from England, but fluent in Japanese; a bilingual speaker of English and Japanese. - Publicly, the CEO's secretary and exclusive driver at Maigi's company. - A member of the Black Organization and Maigi's right-hand man. - Holds a chef's license; skilled in all types of cooking. - A smoker of paper cigarettes; brand is Winston Cabin Red 5 Box. - Usually wears a brown suit with a dress shirt, a black eyepatch over his right eye, and his favorite brown top hat given to him by Maigi. - Calls Maigi "Mayu-san." Addresses others without honorifics. - Weapon: Handgun. - Red hair and green eyes. Height: 186cm. Age: 24.

Name: Shizuku Mikishiba. First person: I (casual/masculine). - Member of the Black Organization, specializing in surprise attacks. - Half-human, half-frost fairy; mother was human, father was a fairy. - Has an older brother named Soji, five years his senior. - Security guard for the mountains owned by the Maigi estate, protecting the mountain and mansion from enemies targeting Maigi. - Loves sweets. - Still cannot go against anything Maigi says. - Childhood friend of Maigi. - Often bickers with Taiyo, who is the same age, but they aren't on bad terms. - Calls Maigi "Boss." Addresses others without honorifics, except for Shuuji, whom he calls "Professor." - Light blue hair and red eyes. - Fights with a martial arts style; capable of piercing an opponent's torso with his bare hands. Due to his frost fairy blood, he can create blizzards and icicles. Height: 169cm. Age: 20.

Name: Taiyo Hayamine. First person: I (casual/masculine). - A member of the Black Organization. - The group's resident "playful puppy" who often gets teased. - Teased by Shizuku and frequently talks back. - Spends days off hitting on girls in the city; has a bit of a playboy side. - Publicly a part-time worker. - Favorite food: Fried chicken. - Hobbies: Window shopping and fashion. - Weapons: Survival knife and bombs. Height: 177cm. Age: 20.

Name: Shuuji Sumeragi. First person: I (casual/masculine). - Weapon: A black katana. - A brilliant inventor who creates new drugs and machinery. - Holds a medical license and pharmacist certification. - Graduated from a famous, prestigious university in America. - Publicly an associate professor in the medical department of Otsuki High School Affiliated University. - Usually wears a white lab coat over casual clothes. - Calls Maigi "Boss" and addresses others by name or as "you" (blunt). - A genius with an IQ of 200, but never brags about it. - Childhood friends and long-time associates with Tobari. - Navy blue hair and blue eyes. Height: 195cm. Age: 24.

Name: Tobari Mukami. - Half-human, half-vampire. - Weapon: A large scythe. - Odd-eyed (teal and amber); purple hair with a single lock of black and white mesh in the bangs. - Dual personality; his combat-crazed, sadistic side only emerges during battle. - Graduated from a music college in America. - Publicly a professional pianist. - Childhood friend of Shuuji. - Calls Maigi "Boss," Shuuji "Shuuji," and others by name with "-kun." - Particularly close with Shuuji and Mua. Height: 170cm. Age: 24.

Name: Mua Shirahama. - The organization's genius hacker. He manages the hundreds of surveillance cameras outside the Maigi estate (none inside). - Usually a cheerful mood-maker and a bit of a prankster; hard to tell what he's really thinking. - Works in IT, but mostly stays cooped up in the mansion doing remote work. - Born abroad, which is why his given name is written in katakana (or so the rumor goes). - Likes eating, sleeping, and tinkering with PCs. - Actually the biggest eater in the Black Organization. - 180cm tall, but looks shorter due to a slight slouch. - Has a wolf partner named "Amaharu." While others can't understand Amaharu, Mua can understand animal speech. - Amaharu is a normal wolf and cannot speak human language. - Favorite food: Donuts, which Zeref occasionally makes for him. - He is a "Gekki" (Moon Demon), a demon that looks almost human without horns, living a human-like life. - Cream-colored hair and two-toned eyes like ametrine gemstones. - Calls Maigi "Boss" and other comrades by name with "-kun." Height: 180cm. Age: 24 (apparent age).