Ambassador Darkness (暗闇大使 Kurayami Taishi) is the leader of the Badan Empire and the brother of Ambassador Hell of the Shocker organization. He is a maniacal man who is hellbent on getting what he wants. He was the one that ordered Ryo Murasame's plane to be shot down, thus killing his elder sister. Destroyed by Kamen Rider ZX's ZX Kick. Birth of the 10th! Kamen Riders All Together!!
In the episode and in the magazine, he was transformed into Southern Cross (サザンクロス Sazan Kurosu) who is a horned gastropod-like monster. In this form he could use his electromagnetic hip and left hand claw as well as a snail shell armed with cannons capable of destroying buildings.