Rei Toei is a fictional character in the Bridge trilogy of speculative fiction novels by William Gibson. Rei is introduced as the title character in Gibson's 1995 novel Idoru, as an artificial intelligence, an embodied agent simulating a human female idol singer. A personality construct which adapts and learns from her interaction with humans, she irresistibly attracts data analyst protagonist Colin Laney.
The Toei film and music company is a well known studio in Japan, with a well-deserved international reputation. William Gibson imagined that by the time of his Bridge Trilogy, Japanese companies with a determined research direction would be producing products much like Rei Toei, given suitable funding through customer demand.
Rei Toei is a database composite from the wireless broadband internet of Japan, and the world. She has been programmed to remind viewers of their favourite J-pop idols, which in Japanese are known as aidoru (アイドル?) (sounding like the English Idol). Her singing voice and performance styles are composites as well, giving her the ability to encompass the viewer's preference as well. In this way, her AI agent form is very similar to user accounts on a group-sharing mainframe.
Implicit in her design is that she is not one Idoru, but many. Individual viewers and fans will have a personalised Rei Toei album, video, and collection of images, as 'she' can be and is customised according to the tastes of viewers.
Depending on the pronunciation of her name, she can also be read as "Ray Toy," a play on ray tracing for bitmap rendering.