From "Kamen Rider-W".

Utopia-Dopant:

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Jun Kazu is the white lab coat-wearing researcher for Foundation X, head of their Gaia Memory investment division. He appears cold and emotionless, speaking in a flat monotone, but when roused to sufficient anger releases his emotions like a torrent. Kazu saves Saeko from her near death at the hands of the Smilodon Dopant out of love, while offering the Foundation's support in her attempt to overthrow her father and Wakana. The briefcase he carries with him at all times contains the 26 T2 Gaia Memories; he eventually relinquishes this briefcase to Tabata to send it back to Foundation X's research facilities. After Ryubee's death, Kazu manages to save Wakana from the burning wreckage of the Sonozaki estate with the intent to use her in the Foundation's own version of the Gaia Impact: digitizing her into one of the Foundation's satellites in order to kill all life on Earth that is not compatible with Gaia Memories in an act of cleansing the human race's impurities. However, Wakana's comatose state forces Kazu to wait until her power resurfaces. In order to awaken her and reclaim Saeko, Kazu reveals himself to the Kamen Riders and displays his sponsor's privilege, a Gaia Driver and a Gold Memory. This Gold Memory, known as the Utopia Memory, allows him to become the seemingly omnipotent Utopia Dopant, whose reality-bending powers result from the Utopia Memory's ability to grant its user's wishes and absorb the emotions of others. After discovering that Philip's emotions are tied to Wakana's powers as ClayDoll Xtreme, he decides to attack everyone close to him in order to initiate the Gaia Impact. After he is exposed as a Necro-Over, Kazu professes his love for Saeko and reluctantly kills her when she rebuffs and attacks him. Shotaro breaks into his lair and uses the Memory Gadgets to disable him and save Wakana, catching Kazu as the Utopia Dopant in a massive explosion as the lab goes up around him. He survives, however, and comes after them, battling Kamen Rider Double CycloneJoker Xtreme. The duo manage to further weaken him by overloading him with Philip's final feelings before using the Double Prism Xtreme Maximum Drive to defeat the Utopia Dopant. Stumbling to his feet, Kazu asks if his own crime was to love and clicks the Utopia Memory one more time before it shatters and he dissolves away into nothingness.

©Toei