Seiji Amanogawa

Seiji Amanogawa is the husband of Miya, and the father to both Kouki and Mitsuki.

Appearance
Seiji is an handsome middle-aged man with smooth brown hair and finely chiseled features. He looks as if he was in his early thirties contrary to his actual age of 45. He also wears glasses.

Personality
Contrary to his charismatic appearance, Seiji is quite meek and cowardly.

Background
Seiji first met his wife Miya when she was on a journey of self-discovery. After they got married, she dragged him to the Yaegashi Dojo to show off her husband to her former sensei Shuuzou. Over the course of their marriage, Seiji and Miya would have their two children Kouki and Mitsuki. At some point as well, Seiji became an employee at a management consulting firm. During Kouki's childhood, Seiji and his family would visit his father Kanji during the holidays. Unfortunately, Kanji passed aways just before Kouki started elementary school.

When Kouki was in his second year of high school, he and his entire class were summoned to anoher world, and stayed there for a whole year.

Chronology
Upon the surviving classmates' return to Earth, Seiji and the rest of his family saw Kouki enter the house he started to explain the circumstances of their sudden disappearance until his friend Ryutarou Sakagami while he was in his werewolf form storm into the house after they panicked when he transformed. Seiji fainted, Miya went on a rampage with a knife, and Mitsuki wetted herself. Kouki immediately knew it was Ryutarou and calmed Miya down and made Mitsuki sleep, all before he punched his friend in the face. After the mess, Kouki's and Ryutarou's families help a meeting in order understand what happened.

When demon-worshiping cultists were attacking the homes of the Returnees, Seiji was desperately attempting to negotiate with those who were at the Amanogawa residence, but to no avail. He and he rest of his family were saved by Ryutarou Sakagami, and were later relocated to Hajime Nagumo's home, along with the other families of the Returnees, to protect them for the duration of the incident.

Etymology

 * The name "Seiji" means "sacred, holy" (聖) and "reign, rule, calm, peace" (治).
 * Seiji's surname "Amanogawa" means "heaven, sky" (天), "this" (之), and "river, stream" (河).