Tetsuro Okonogi (小此木 鉄郎 Okonogi Tetsurō ) is the president of a company who has ties with Rudolf's and Hideyoshi's companies. He is hinted to be one of the Higurashi no Naku Koro ni characters, and is shown as an older version.
In Alliance of the Golden Witch, he is responsible for telling Ange that her hatred of Eva prevents her from fully understanding what happened on Rokkenjima, because "without love, it cannot be seen." He allows her to escape as the Sumadera attempt to capture her and arranges for Juuza Amakusa to act as her bodyguard.
- He is the only Higurashi character to appear as the same person as he was in Higurashi, as Rika apears as Bernkastel, Satoko or Takano appear as Lambdadelta, and Hanyuu appears unnamed in a Sakutarou costume, and later as Featherine.