Ares, William

ウィリアム・アレス

A master swordsman who also doubts that Yumiella is level 99. He repeatedly challenged Yumiella to fights despite being outmatched. He initially believed she was the Demon Lord, assuming she would commit wicked deeds in the future, even though it was confirmed that she definitely wasn't because the Demon Lord is a man. As the story progresses, he gradually loses his dislike of Yumiella.