EXE

EXE is a gang of teenagers that starts causing trouble in Windy City a year after the dissolution of the Museum. They claim to be the successors to the Museum's Gaia Memory business, & look throughout Windy City for any Gaia Memories that remain. They were arrested after their leader's defeat by Kamen Rider Double Detective.

Perry Fermi
A figurehead leader for EXE, Perry Fermi possesses the Edge Memory. He pursues Bindy's brother Bert to acquire the Ocean Memory. However, Perry's posse are defeated & his Gaia Memory destroyed by Kamen Rider Joker before he could use it to transform into a Dopant.

Energy
A nameless pet shop employee working under Santaman, who goes by the alias of "Energy" is the true leader of EXE. It is only after the members of his group are arrested that Energy reveals himself as he attempts to kill Simon for meddling in his affairs. As the Energy Dopant, he is able to fire blasts of electromagnetic energy as well as use his left arm like a rail gun. He is defeated when Charlie returns & joins with Simon to become Kamen Rider Double Detective CycloneJoker once more, destroying the Energy Memory through the Joker Extreme Maximum Drive.
 * Identity: nameless
 * Episode: 49
 * Memory Break: Kamen Rider Double Detective's Joker Extreme

Other members
In addition to Perry Fermi & "Energy", there are three other members of EXE who fight Simon. They are nicknamed after the first word of the Gaia Memory they possess.

A
A member of EXE, known as "A", possesses the second Anomalocaris Memory. He transformed into the Anomalocaris Dopant to fight Simon as Kamen Rider Joker, though easily defeated by his Rider Punch.

C
A member of EXE, known as "C", possesses the second Cockroach Memory. He transformed into the Cockroach Dopant to fight Simon as Kamen Rider Joker, though easily defeated by his Rider Kick.

O
A member of EXE, known as "O", who was supposed to be given the Ocean Memory, which was taken by Perry from Bert. Like Perry, he had the ability to transform into a Dopant. However, his Gaia Memory is destroyed by Kamen Rider Joker before he could use it.