Косукэ Эндо

Хадзимэ Нагумо's classmate, who was summoned to Tortus. An inconspicuous young man who cannot be detected by monsters or automatic doors. When his classmates found themselves in a dire situation, he ran to seek help from adventurers, where he encountered Hadzime, but did not recognize him at first. Later, he persuaded Hadzime to help his classmates. After the victory over Ehito and returning to Earth, he received the nickname "The Dark Lord's Right-Hand Man". Subsequently, he assembled his own harem.