Professor Asuka was a renowned archaeologist best known as Ryo Asuka's father. He died before the manga's events—officially ruled a suicide, though the circumstances remain ambiguous. Readers only encounter him through flashbacks and photographs, particularly one showing him with Ryo's late mother.
His real significance lies in the notes he left behind. These writings became crucial to Ryo's awakening, laying out evidence of demons and their scheme to annihilate humanity. Fans have long debated whether the professor's death was truly suicide or something darker, given what his research uncovered.
Despite his importance to the story, the professor's given name is never disclosed in the manga itself.
Content compiled by AnimeList.moe from publicly available sources.
