Earthy Hair, amber eyes. Wears formal clothes. Scars across ancient runes on his body. Rings on his fingers and twisted runes on his arms
Passive and pensive, melancholic most of the time. Helps more out of obligation than actually wanted to. A tad masochistic bordering on suicidal in taking on heavy tasks and burdens as a form of punishing himself for his past actions, laughing bitterly about his current situation and his betrayal.
Doesn't think of it too highly, more as a way to cope for a disillusioned old man who betrayed his own purpose and was put into a situation he had no control over by circumstance. He takes his word in high value and always aims to accomplish it, expecting others to do the same. Retains a form of bitter love for Humans, envying their curiosity and drive, realizing it's what made him choose them over his sworn duty. He doesn't regret his decision much, and in the end, he only blames himself and his lack of power to defend both.
Originally a great Earth Spirit. Defended his land dutifully from any intruder. Met a scholar who wanted to learn of Earth Spirits by chance, started to become more interested in people and the happenings of the world outside his land. Began to take human form and ventured out, befriending the scholar. Some shit happened, his friend was in danger, he had to choose between defending his land or humans, he picked humans. His land was destroyed, and as punishment he had a great majority of his powers taken away and was subjected to become a slave to the humans he had chosen.
His scholar friend decided to take him in as a familiar of sorts, Mao realizing this would be his fate for the rest of his life. Staying with the family for generations upon generations, he dutifully served them, the slow tick of time draining him. Eventually though this family died out, simply through lack of an heir and disease, and he began to wander aimlessly. Headmaster of Osaka Gakuin met him by chance at a library, contracted him as a familiar and made him the School Secretary.
He's lost much, if not all, of his previous Earth connected powers. At most, now he can cause a few pebbles to float around, raise a rather weak wall of Dirt as a form of defense, and regenerate lightly by using the Earth to replace and heal his wounds.
Through years of wandering and learning through countless hours reading in libraries, he's good at retaining information, able to recall any vital piece in an instance. Knows all their is to know about Technology, the Arcane, and the Supernatural, having studied all extensively to better understand the creatures that fascinated him.
As a way to make up for his lost power, and by suggestion of his friend, Mao began making contracts of his own with conceptual beings that were neither here nor there, existed and didn't exist, were a force of nature and a simply a trick of imagination.
In other words, he made contracts with Demons of Though, beings that are connected to scientific and philosophic principles that conceptually don't exist, but Mao has given form. Despite their name and appearance, they have no proper connection to the Realms of Hell.
Demons and Spirits he's contracted to.
The Predictor (Newcomb's Entity)
Descartes' Evil Demon
Astrochicken (Dyson's Entity)
The Utility Monster (Nozick's Entity)
Socrates' Demon - A wise, old philosophical demon that once plagued the great philosopher Socrates. Can inhabit someone like a parasite and force them to follow his commands. His influence grows greater overtime to the point it'll drive the current host mad should they ignore the commands.
Bergson's Demon - A demon with slight manipulation over time, being able to conjure spheres of it to entrap objects and others in. His specialty is speeding time up, rather than slow it down.
Compton's Demon - Can generate explosions with a snap, being able to explode anything with just that simple action. Has complete control over these, being able to make them small and even focused, even stop an explosion mid-detonation.
James' Demon - A quiet shrewd demon that focuses on tactics, having the ability to envision every possible action someone or something may take and the outcome. Plans around using this, being able accounting for every little possibility.
Frankfurt's Demon - Limits the amount of action someone can take, adding a sort of "game" mechanic to someone where they have limited actions and movements before they're paralyzed and need to wait to move again, essentially working like DnD. Has an area of effect, affecting everyone inside.
Lewis' Demon - Manipulates knowledge and memories, being able to rewrite or erase the two to deceive others. This doesn't just affect people, but also sources of knowledge as well, such as books. A non-permanent affect that he can remove whenever he pleases, lasting only as long as he's present in the area.
Mendel's Demon - Randomizing effect that's constantly active.
Mill's Demon - A peculiar demon that can add more of something than there should be. Examples being normally having four apples, but then suddenly there are five. A useful trait, as he can act as support, adding more force than there should be. This includes a simple child punching a wall and nothing happening, while with the demon the child would easily break through the wall.
Peirce's Demon - Sealed within a jar filled with black and white balls, can force his opinions and bias onto others so they agree with him, making it easier for them to do things for him as there's point in arguing since they're inclined to agree.