|This article is about a/an Dopant identity in Kamen Rider W.|
- Height: 260cm
- Weight: 132kg
As the IceAge Dopant, the user has the ability to make absolute zero ice and use it in any fashion, from attacks to clones.
- Main article: Kiyoshi Katahira
The main user of the IceAge Memory was Kiyoshi Katahira (片平 清 Katahira Kiyoshi), the son of flower coordinator Makiko Katahira (片平 真紀子 Katahira Makiko), who received bad press due to her son's actions. Obtaining the IceAge Memory to become the IceAge Dopant, Kiyoshi used it to attack anyone who made him mad such as Shotaro when he unintentionally shoved Kiyoshi out of the way while looking for Makiko. After his clone was destroyed by Accel's Accel Glanzer Maximum Drive, believing the Dopant to be the one he is looking for, Kiyoshi ran into his mother as she took the Gaia Memory from him to take the blame for the attack. However, Shotaro uncovered the truth as IceAge Dopant was defeated by Accel's Dynamic Ace Maximum Drive and Ryu Terui arrested Kiyoshi instead of killing him in revenge, only to learn that Kiyoshi was not his target when he discovered that he possesses the IceAge Memory and not the W Memory. Up until this time, the IceAge Dopant is only referred to as the icy Dopant (氷のドーパント Kōri no Dōpanto).
Kamen Rider Wizard
The IceAge Dopant was one of the monster souls, presumably the essence of the IceAge Memory, which surfaced in the world within the Magic Stone. It was destroyed with the other monsters in the battle with the 14 Heisei Riders, among those falling before a combination of Blade's Lightning Slash, OOO's OOO Bash and Agito's Rider Kick.