Roidmude 100 is Cobra-Type Roidmude of the Grim Reaper Unit who appears in the DVD special Kamen Rider Drive Secret Mission: Type Lupin! ~Lupin, the Last Challenge~. He has the ability to re-use defeated Roidmudes' weapons. His goal is to hunt 100 different kinds of weapons and learning 100 combat techniques. In one of his hunts, he steals Zoruku Tojo's Lupin Gunner and begin poses as Kamen Rider Lupin. Prolonged transformation as the Rider granted him the ability to summon Core-Less Roidmudes. He taunts Shinnosuke and the Special Investigations Unit until Shinnosuke reveals his true identity during his 100th weapon theft (a historical Katana from a museum) by revealing that the real Lupin had returned the "Kamen Rider" title to him, something that the impostor forgotten. After Zoruku Tojo regains the Lupin Gunner, he assists the Kamen Riders in defeating Roidmude 100.
Roidmude 100 is voiced by Kenji Takahashi. While disguised as Kamen Rider Lupin, he is portrayed by Yūji Ayabe.