A swordsman determined to save his sister, and humankind. He finds himself fused with a symbiotic supernatural race, Arena, who follows him on his travels. He has medium-length dark brown hair tied in a ponytail, and wears all black with a long coat.
10 years ago, there was a war between 2 countries. A few years after the war ended, unknown monsters began to emerge and slaughter the humans. As Leader of the royal Knights, Kazer had a blessed family, but it was shattered by the monsters’ arrival.