Ra-Dorudo-Gu, labeled by the police as Unidentified Life Form #8, is a member of the Ra Group of the Gurongi and one of the judges of the Gurongi game, as well as one of the two secondary antagonists in Kamen Rider Kuuga.
Ra-Dorudo-Gu joined Ra-Baruba-De in overseeing the Gurongi game after the Go Group entered it. He used his abacus to count the number of kills committed by the Go Group Gurongi. However, his abacus was later destroyed by Ichijo with a Marking Bullet, causing Dorudo to lose his purpose as the game's overseer. Dorudo is thus forced to fight for his life against Go-Gadoru-Ba as Ichijo arrives to the scene.
Dorudo attempts to retreat from the fight but is pursued by Sugita and Sakurai. The two shoot Dorudo with the completed Nerve-Breaking Bullets, killing him.