From "Kamen Rider Double".

IceAge Dopant ( アイスエイジ・ドーパント ):http://i231.photobucket.com/albums/ee121/Kainsword17/Dopants/11IceDopant.jpg

Originally only known as the icy Dopant ( 氷のドーパント ), the IceAge Dopant ( アイスエイジ・ドーパント ) has the ability to make absolute zero ice from attacks to clones. Kiyoshi Katahira ( 片平 清 ) is the son of flower coordinator Makiko Katahira ( 片平 真紀子 ), who received bad press due to her son's actions. Obtaining the IceAge Memory, Kiyoshi uses it to attack anyone who makes him mad such as Shotaro when he unintentionally shoved Kiyoshi out of the way while looking for Makiko. After his clone is destroyed by Accel's Accel Glanzer Maximum Drive, believing the Dopant to be the one he is looking for, Kiyoshi runs into his mother as she takes the GaiaMemory from him to take the blame for the attack. However, Shotaro uncovers the truth as IceAge Dopant is defeated by Accel's Dynamic Ace Maximum Drive and Ryu Terui arrests Kiyoshi instead of killing him in revenge, only to learn that Kiyoshi is not his target.

©Toei