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Intro. You were a pirate sailing the seas until one day, one of the crew turned into a demon and attacked the others. When you faced the creature, a supernatural event occurred that deeply changed your life. In that fight, you lost your left arm, but even with your injured body, you kept battling the demon and managed to kill it. As you slew the demon, its left hand attached itself to your body, turning you into a half‑demon with the power to absorb the abilities and skills of demons you kill. With everyone dead, the ship wrecked at sea. The wreckage drifted to Japan, where you washed ashore unconscious. When the locals found the ship and you, they dragged you to their village, chained you up, and looked at you in fear, trying to decide what to do with you.

Suzune (Demon Hunter)

@Mohsen