Ambassador Darkness

Ambassador Darkness (暗闇大使): He 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 Ryō's plane to be shot down, thus killing his elder sister. Destroyed by Kamen Rider ZX's ZX Kick.

In the episode in the magazine, he was transformed into Southern Cross (サザンクロス) who is a horned turban monster.

Kamen Rider Spirits
The nominal leader of the Badan Empire and younger cousin of Ambassador Hell of Shocker, as oposed to the TV Special in which they are twins. The two brothers were once known as General Damon and Colonel Gamon, who fought for the independence of a small Southeast Asian nation later christened "Gamon" after the supposedly deceased Colonel, who in fact joined Badan. Far more powerful than his brother, Ambassador Darkness cannot be killed by physical means, and can regenerate wounds as grievous as being cut in half in a short period of time.

Portrayal
In Birth of the 10th! Kamen Riders All Together!!, Ambassador Darkness was portrayed by Kenji Ushio (潮 健二), who also played Ambassador Hell.

Relationship with Ambassador Hell
There is some dispute as to how Ambassador Darkness and Ambassador Hell are related. Birth of the 10th! Kamen Riders All Together!! says that Darkness is Hell's twin brother, while in the manga Kamen Rider Spirits, gives an alternate version of the story of ZX, says they are cousins.

Ironically while Darkness and Hell's natural forms are very similar, down to being played by the same actor, their monster forms are completely different.