From "Kamen Rider Double".

Invisible-Dopant:

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http://i231.photobucket.com/albums/ee121/Kainsword17/Dopants/Invisible-Dopant.jpg

Lily Shirogane is a popular magician trying to follow in her grandfather Frank's footsteps. To emulate his most famous trick, the disappearing lady, Lily is given the Invisible Memory by Dr. Isaka, turning her into the Invisible Dopant. However, Isaka has modified the Invisible Memory such that she does not turn into a monstrous Dopant and making it impossible to remove from her body. She initially goes to the Narumi Agency for help in finding the man who gave it to her under the pretense that she wishes to have it removed, but instead she wants to be able to control the invisibility. Isaka agrees, stabilizing the Gaia Memory, only because he knows it will eventually kill her and he will be able to take it from her after she dies, giving him the power of invisibility without the Dopant transformation. However, by killing her and using his Engine Blade as a defibrillator to quickly revive her, Kamen Rider Accel removes the Invisible Memory and crushes it.

©Toei