In the beginning, there was nothing, no light, no darkness, no time, no space, no start, no finish. Then, there was something. A singularity rapidly growing in the infinite expanse, covering all that once was nothing. Thus was the creation of something.
But something without relation with something is nothing. A definition without measure is meaningless. Thus something was created to define this something, so that it would not be nothing. This form of divine expression was called mathematics.
Mathematics was a beautiful and powerful concept. It could define, measure, and solve things that were previously indefinite, unmeasurable, and unsolvable. Such power needed to be cultivated and nurtured. Unchecked, math could become meaningless. With such power, the master of math must be a being of pure, incorruptible spirit, one who would only wield math as a tool for good, not a weapon for evil. Out of this necessity, Archangle Petrello was born from the magnitude of a thousand trig functions, the one, unquestioned, master of math.