EXE

EXE (エグゼ, Eguze?) is a gang of teenagers that starts causing trouble in Futo a year after the dissolution of the Museum. They claim to be the successors to the Museum's Gaia Memory business, and look throughout Futo for any Gaia Memories that remain. They were arrested after their leader's defeat by Kamen Rider Double.

Shiro Endo
A figurehead leader for EXE, Shiro Endo (遠藤 士郎, Endō Shirō?) possesses the Edge Memory (エッジメモリ, Ejji Memori?). He pursues Yui's brother Akira to acquire the Ocean Memory (オーシャンメモリ, Ōshan Memori?). However, Shiro's posse are defeated and his Gaia Memory destroyed by Kamen Rider Joker before he could use it to transform into a Dopant.

Shiro Endo is protrayed by Shōhei Minamiha (南羽翔平, Minamiha Shōhei?).

Energy
A nameless pet shop employee (ペットショップの店員, petto shoppu no ten'in?) working under Santa-chan, who goes by the alias of "Energy" (エナジー, Enajī?) 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 Shotaro for meddling in his affairs. As the Energy Dopant (エナジー・ドーパント, Enajī Dōpanto?), he is able to fire blasts of electromagnetic energy as well as use his left arm like a rail gun. He is defeated when Philip returns and joins with Shotaro to become Kamen Rider Double CycloneJoker once more, destroying the Energy Memory through the Joker Extreme Maximum Drive.
 * Identity: nameless
 * Episode: 49
 * Memory Break: Kamen Rider Double's Joker Extreme

The pet shop employee is portrayed by Tomu Suetaka (末高 斗夢, Suetaka Tomu?).

Other members
In addition to Shiro Endo and "Energy", there are three other members of EXE who fight Shotaro. They are nicknamed after the first word of the Gaia Memory they possess.

A
A member of EXE, known as "A" (Ａ（エー）, Ē?), possesses the second Anomalocaris Memory (アノマロカリスメモリ, Anomarokarisu Memori?). He transformed into the Anomalocaris Dopant (アノマロカリス・ドーパント, Ōshan Dōpanto?) to fight Shotaro as Kamen Rider Joker, though easily defeated by his Rider Punch.

"A" is portrayed by Ryuusuke Ito (伊藤 竜翼, Itou Ryūsuke?).

C
A member of EXE, known as "C" (Ｃ（シー）, Shī?), possesses the second Cockroach Memory (コックローチメモリ, Anomarokarisu Memori?). He transformed into the Cockroach Dopant (コックローチ・ドーパント, Ōshan Dōpanto?) to fight Shotaro as Kamen Rider Joker, though easily defeated by his Rider Kick.

"C" is portrayed by Naofumi Kaneko (金子 直史, Kaneko Naofumi?).

O
A member of EXE, known as "O" (Ｏ（オー）, Ō?), who was supposed to be given the Ocean Memory (オーシャンメモリ, Ōshan Memori?), which was taken by Shiro from Akira. Like Shiro, He had the ability to transform into a Dopant. However, his Gaia Memory is destroyed by Kamen Rider Joker before he could use it.

"O" is portrayed by Mitsuki Matsumoto (松本 光希, Matsumoto Kitsuki?).