Monster Lord

In truth, it's a lifeform created by humans
from an ancient civilization.

In ancient times,
women (with their high magical energy retention capacities)
were the rulers of the world, while men were tyrannized.

To overturn this situation,
men from ancient times planned to rid the world of magical energy,
and created a "magical energy absorption device".

Simultaneously, they created a system for the sake of defending it,
which would end up being called the "Monster Lord".

In the end, although they succeeded in making magical energy disappear
from the world and reversed the status of men and women,
before long there was a war and the ancient civilization collapsed.

But even after that, the Monster Lord continued
to absorb the world's magical energy in accordance
with the orders it had been given.

And this continues even into the present era
that's seen the rise of a new human civilization.

Because the current humans have no knowledge of these circumstances,
they simply view the Monster Lord as the "enemy of humankind".

Additionally, the Monster Lord has no fixed physical appearance or sex.
It automatically changes to assume the form of what humans fear.
After reading the mind of the Hero who'd fought numerous women
and come to know their strength, it's currently taking the form of a woman.

Height: 168cm
Measurements: 106(L)-58-90
(Her bust size is adjustable to a degree.)