This article is about a/an villian in Kamen Rider W.
"Fate is truly as interesting as it is ironic."
―first words to Double[src]

Kyosui Izumi (泉 京水 Izumi Kyōsui) was a flamboyant gay man with sadomasochist quirks member of NEVER who serves as Katsumi Daido's right hand man. In Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, he becomes the Luna Dopant.

Kyosui Izumi

Kyosui Izumi death

Mortally wounded, Kyosui Izumi dies for the first time.

Izumi is a gay man with sadomasochist quirks and was once a yakuza subordinate until he was betrayed and fatally stabbed in the chest. After he was revived, he fell in love with Katsumi as he was the last thing he saw before his death, tending to call him 'Katsumi-chan' and get jealous of anyone who gets too close to him. Should anyone question Katsumi's motives, Izumi would always stick up for Katsumi and explain his reasons. He would follow Katsumi without question and went on nearly every mission with him.

In the Futo City mission of the retrieval of the 26 T2 Gaia Memories to convert all of Fuuto into Necro-Overs, he gains the T2 Luna Memory, and during his last clash with Kamen Rider Double, he proved to be a resiliant wall, until he fought Kamen Rider OOO and was defeated by the Rider's OOO Bash Scanning Charge, turning into dust instantly.

The Fateful Sengoku Movie Battle

A Luna Dopant created by the God Tree was part of a monsters army led by Nepenthes Inhumanoid appeared to Prevent Wizard, Beast, Gaim, Ryugen, Baron, and Zangetsu from stopping Bujin Gaim from acquiring the ultimate power. He was defeated by OOO Arms's OOO Bash with the Medajalibur along with the Metal Dopant, Hagetaka Yummy, and Sphinx. Kamen Rider × Kamen Rider Gaim & Wizard: The Fateful Sengoku Movie Battle


Izumi is an expert in grappling and can wrap himself around an opponent's body to snap it like a twig. His main weapon is a whip which he uses to great effect.

Dopant Form

Main article: Luna Dopant

Luna Dopant

―Transformation announcement[src]
  • Height: 242
  • Weight: 120

He used T2 Luna Memory to transform. As the Luna Dopant, Izumi gains the ability to create illusions so powerful that they're nearly indistinguishable from reality. His main uses are to create swarms of T2 Masquerade Dopants and extending his whip like arms to any distance in order to attack.

Behind the scenes


Kyosui Izumi is portrayed by former mixed martial artist Genki Sudo (須藤 元気 Sudō Genki).[1] As the Luna Dopant, his suit actor is Yugo Fujii (藤井 祐伍 Fujii Yūgo).


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