Tanaka (Decade)

This article refers to Kamen Rider Alternative in Nega's world and appears as a character for the show Kamen Rider Decade For the Original Kamen Rider Dark Kiva see Kamen Rider Alternative

Alter-ego
Currently there are three people who have assumed the title Alternative:
 * Professor Hideyuki Kagawa, original series Alternative 00
 * Hajime Nakamura, original series Alternative 01
 * Tanaka, who is one of main characters Antagonis in Kamen Rider Decade.

Fictional character biography
An A.R. version of Alternative is a monster associated with the Dark Riders who assumed the guise of the Negatives World counterpart of Tanaka, Natsumi's high school teacher. Though ordered by Otoya to keep an eye on Natsumi rather than kill her, he intentionally decides to attack Natsumi, resulting in Dark Kiva beating him merciless. Alternative is then later destroyed by Diend. Although referred to as Alternative, the suit is actually that of Alternative Zero.