神怒之日 ～夜访穿刺公～
Wilhelm Ehrenburg (The Day of God's Wrath ~Night Visit to the Piercer Duke~)
A member of the Thirteen Knights of the Holy Spear, he spent many years wandering battlefields after World War II and was secretly pursued by the United Nations. Before going to Japan, he was interviewed at a vampire bar in Brooklyn, New York, sharing his experiences at the end of the war.
Claudia Jerusalem (Day of God's Wrath ~Night Visit to the Piercer Duke~)
During the Warsaw Uprising, he met Sister Wilhelm; both suffered from albinism, and they lived together thereafter. She cannot move during the day, so she feels like she is only half a person; This idea also inspires her to admire, respect, and love those who can live under the sun.
The Day of God's Wrath ~Night Visit to the Piercer~
"Dies irae ~Interview with Kaziklu Bey~" is a spin-off visual novel centered on William Ehrenburg. William, who appeared as a villain in "Amantes amentes," was interviewed to reflect on his experiences at the end of World War II.