Hinata Souichirou

Youichi's biological father. Adopts Aoi shortly after the birth of his son. Has a strong resolve in the preservation of humanity, spending the entirety of his life's research on finding the means to do so

Spoiler

, even going as far as killing over 500 people in order to prevent the Lunar Virus from spreading

. Cares greatly for his family and pertains a slight alcohol problem.