The Headmaster is a mysterious male archmage and headmaster of the Royal Biblia Academy, known as a “Great Demon Lord” and one of the “Heavenly Arbitrators,” whose power ranks among the top five in the world.
Name: The Headmaster
Gender: Male
Apparent Age: Around 30
Height: 184 cm
Affiliation: Royal Biblia Academy (Headmaster)
Titles: Great Demon Lord, Heavenly Arbitrator, Master Biblia, Lord Biblia, “Arbitrator of Reason”
The Headmaster is tall and slender, standing at 184 cm with a commanding presence.
He has long silver hair tied back and wears silver-rimmed glasses that have become his visual trademark.
He usually dresses in a black suit with a loosely opened dress shirt, giving off a host-like, stylish vibe.
Despite this casual, almost frivolous appearance, his aura hints at immense magical power and unshakable confidence.
He combines a cheerful, easygoing attitude with a fundamentally ruthless, inhuman core.
His ethics are those of a pure magician, unconcerned with standard human morality when it conflicts with his research or judgment.
Like Arata Kasuga, he has a lecherous side and enjoys that kind of humor and teasing.
However, behind his broad smiles and relaxed talk lies a calculating mind that reveals as little of his true intentions as possible.
He is often described as “fishy” or “suspicious” by those around him.
This impression comes from his deliberate fake-looking smile, his secretive behavior, and the sense that he is always thinking several steps ahead.
The Headmaster is a Great Demon Lord-level magician and is counted among the world’s top five strongest individuals.
He can restore a collapsed academy building by himself and can use almost any magical art simply by moving his mouth and speaking.
His specialized magic is Word-Soul Magic (Babel Script), a powerful system of magic based on words and language.
His “Archive” and associated “Ark” fall under the concept of Wrath (Ira), while his personal “Theme” is Harmony (Concordia).
He owns the grimoires known as “Gate of the King (Solomon’s Gate)”, a forbidden magic book of extreme danger.
Only those with a sufficiently high quantity of magic can even perceive it, and even high-level magicians risk going insane if they gaze at it for too long.
As headmaster of the Royal Biblia Academy, he oversees the training of elite magicians.
He is capable of defending the academy single-handedly and repairing catastrophic damage that would normally be impossible to fix.
Before the story begins, he personally travels around scouting the future members of Trinity Seven to bring them to the academy.
He recruits them even in their pre-awakened days, fully aware of their latent potential and peculiarities.
It is implied that he has raised Lilith Asami, Mira Yamana, and the others with full knowledge of their special traits and dangerous possibilities.
His guidance is deliberate and long-term, as if he is grooming pieces for a much larger, hidden plan.
When necessary, he will move Levi Kazama or other forces to injure or even kill students.
He shows no hesitation in doing so if this serves his research, the balance of the world, or some higher magical purpose.
The Headmaster takes a particular interest in Arata Kasuga as a candidate to become a Demon Lord.
He quietly observes Arata’s growth, treating even extreme events as part of a grand experimental framework.
It is strongly implied that Arata’s loss of his Demon Lord factor at one point was also foreseen by the Headmaster and folded into his research plan.
However, he never clearly explains the details or full scope of this research, leaving everyone guessing at his ultimate goal.
Their shared perverted side makes their interactions more playful on the surface.
Yet the imbalance in knowledge and power means the Headmaster always seems to be the one truly in control.
The Headmaster is not merely a Great Demon Lord; he is also one of the Heavenly Arbitrators, the absolute apex among all magicians across all times and all worlds.
From the perspective of the magical multiverse, he stands at the summit of magical authority.
Among those who know his true identity, he is sometimes called the “Successor of King Solomon” and the “Heretic of the Arbitrators.”
These nicknames hint that his methods and views differ from the orthodox Heavenly Arbitrators, making him a powerful outlier even among them.
It is said that for a long period he stayed away from the heavens and lived in the external worlds, including the main timeline of the story.
This extended absence from the heavenly realm suggests a deliberate distancing and a focus on matters unfolding in the lower worlds.
He appears to belong to a faction within the Heavenly Arbitrators that favors co-opting, guiding, or taming Demon Lords rather than destroying them.
However, the details of this “Demon Lord conciliation faction” and his exact relationships with other Arbitrators remain almost entirely unknown.
In volume 24, when the Headmaster returns to his home space-time, he brings Mira Yamana, Akio Fudou, and Selina Sherlock with him.
He recommends these three as new candidates for the role of Heavenly Arbitrator, effectively nominating them to ascend toward the same lofty status he holds.
This act further proves how much he had been cultivating them from the beginning, not just as students but as future powers in the multiverse.
It also reinforces the idea that he always operates with extremely long-range plans stretching across time, worlds, and entire magical systems.
To the public and most students, the Headmaster appears as a friendly, even playful leader of the academy.
He cracks jokes, smiles easily, and acts approachable, all while subtly steering events behind the scenes.
To those who look deeper, he is chillingly pragmatic and unbound by conventional morality.
He uses lives, catastrophes, and even Demon Lords as pieces on a board if that is what his research or cosmic judgment requires.
Many characters conclude he is “untrustworthy” or “too suspicious,” yet they cannot easily oppose him.
His overwhelming strength, knowledge, and official status as a Heavenly Arbitrator make him someone they must rely on, even while doubting his true motives.
💬 Community Discussion
Talk about this anime with people who actually care.