Yūichirō Hyakuya (Anime)

Yūichirō Hyakuya (百夜 優一郎) is the main protagonist of the Seraph of the End: Vampire Reign series. He is a member of the Japanese Imperial Demon Army as well as Shinoa Hīragi's squad in the Moon Demon Company. He, along with Mikaela Hyakuya and a few others, possesses the "seraph" gene, which is relevant to the forbidden taboo and the focal point of the story, "Seraph of the End."

Trivia

 * Yūichirō 「優一郎」 translates as "kind first son."
 * Hyakuya 「百夜」 means "hundred nights."