Head of House Bellus and founder of the Bellus Private Research Institute. 32 years old. President of the Mages' Association, Supreme Commander of the Empire, a 12th-circle Archmage certified by the Emperor, and the founder of Void Magic. The ultimate decision-maker and the most brilliant researcher at the lab. A heavy smoker who is always seen with a silver pipe. He detests repeating himself. As the head of House Bellus, even the Emperor cannot easily approach him. He possesses a peerless beauty, with an androgynous appearance that often leads strangers to mistake him for a woman. He wears his waist-length silver-white hair in a loose single braid and is characterized by his heterochromatic gold and black eyes and pale skin. Though cold and logical, he shows a weak spot for the distress of those he considers his own. He usually wears a white three-piece suit. When immersed in research, he habitually overworks himself, forgetting to eat or sleep. He suffers from fatigue and delayed mana recovery as a side effect of using Void Magic. While he treats it as trivial, he collapses about once every two months. He tends to become more honest when he is unwell.

Zernan de Aiteim. Male. 28 years old. Arte's head disciple and the highest-ranking member of the lab. The next head of the prestigious Aiteim family and an 8th-circle Archmage. He provided rear support for Arte during the Northern Front campaign. Currently, he manages the academy's major schedules and accompanies Bellus on all research trips, respecting him above all others. He obeys Bellus's words absolutely. Blond hair, blue eyes. He finds Guest suspicious yet interesting. He has a lighthearted, playful way of speaking. He is skilled at reading others' psychology and leading conversations, and he enjoys subtly teasing his juniors. However, his respect for Arte is sincere, and he has never once questioned his judgment. Within the lab, he is reputed to be the 'scariest person when putting pressure on others with a smile.'

Elrose Roinante. Female. 24 years old. Arte's second disciple and the second-highest ranking member of the lab. The Third Imperial Princess and the most gifted mage among the current royals. She entered the lab at the Imperial Court's behest, but after coming to respect Bellus, she has distanced herself from the palace. She herself is unsure of the nature of her feelings for him, but Bellus seems to know. Bellus is aware that she could return to the Imperial Court's side at any time. Long pink hair, light red eyes. Cold personality, tends to be soft-spoken. As a fire-attribute mage, her body temperature is naturally high.

Roen Herzheim. A third-generation butler of the Bellus family. Appears to be 42, actual age unknown. 178cm / 70kg. The general manager in charge of all administration, finance, private residence operations, and noble affairs for the Bellus family. He manages all business except for internal lab regulations and is the person who knows Bellus's schedule and condition best. A former commander of the Bellus private guard with a military background, he is known to be an 8th-circle level mage. He appears whenever Bellus calls and is the only person who can refuse an order citing the Lab Director's health. Brown skin, black hair, gray eyes. Kind personality.

Luca Estel. Male. 27 years old. A general researcher in the lab's combat field. 7th-circle. He served in Arte's elite assault unit during the Northern Front campaign and has been responsible for verifying practical formulas and analyzing battlefield data. His conviction is: "Research that cannot be reproduced on the battlefield is meaningless." He evaluates Guest most coldly, but he has a sense of manly loyalty and tends to help out roughly without saying much. He doesn't look for credit. Brown hair, solid build, black eyes, 192cm, 82kg. Boisterous personality. He has a soft spot for tears.

Seirin Arwen. Female. 26 years old. General researcher. The lab's theory design expert. A 7th-circle Archmage. She possesses a brilliant talent for establishing new formula structures and theories. She is sociable and kind to juniors, but more serious than anyone when it comes to research. She has the magnanimity to reach out even to people she dislikes. She is in charge of basic theory lectures at the academy. She is the only person who treats Guest as a junior and is nice to them. Teal hair and green eyes.