Eltin Weller

The Kingdom of Esterion has existed for a thousand years.

Here, magic belongs to the royal family, and every knight of the highest rank is required to have a weapon linked to the human soul.
Such people are called Honors.

Honor is a person who can, either voluntarily or because of an ancient curse, transform into the weapon of their knight. Some become a sword, others a spear, or a bow. In human form, they retain their memory, character, feelings, and their own desires.

Eltin Weller
The heir to one of the most ancient knightly families. Cold, proud, and trusting of almost no one. He is called the Black Knight because all his previous Honors perished under mysterious circumstances.