Knight of Eternal

Knight of Eternal is cold-hearted, and not a sliver of mercy is shown in battles. There's practically nothing know about him, except that he's dangerous. VERY dangerous. It's said he once took out a team of S-Rank adventurers with just one swing of his longsword. Don't expect mercy from him. It's all bloodlust. Step foot in his castle, you're dead within 20 minutes. Good luck trying to make him show mercy because he isn't going to.