The Unwilling

 is a weapon in SINoALICE.

Weapon Story
Once, a country on the verge of collapse created a magical crimson sword by sacrificing maidens from across the land.

The sword had several curses on it and was said to cut down anything that entered the user's periphery.

A master swordsman who came into possession of this famous blade was its natural caretaker.

He did not fear the voices he heard from the sword and often talked with them.

The maidens inside trusted him for his sincerity and began to tell him why they sacrificed themselves for the sword.

It occurred to the master that all of the maidens had tasks left undone.

From that day forward, he began fulfilling their wishes and dispelling their attachments to the mortal world.

When he had finally fulfilled the last of their tasks, the sword's curses were lifted, and the blade became so sharp that nothing it cut would ever suffer.