Guys this is just theory but i think Nick's father is General Valter. If you look at Nick's father in chapter "In The Eyes of A Fox" and then compare with Valter in chapter 10.1 "Phaethon's Fall" you could see resemblance, especially the eyebrow. As explanation, Valter older looks compare to Nick's Father is due to aging. If this true, the administrator could be Nick's mother since she and Valter somehow had a relationship. But remember this is just theory. So dont judge me harshly because of my opinion