Kuriba Ryouko

Kuriba Ryouko (操歯涼子 (くりばりょうこ)) is a student of School District 20's Shinshikimi Middle School and the creator of Indian Poker.

Appearance
Kuriba Ryouko has vertically striped hair, alternating between light and dark from a dark stripe at the middle of her frontal fringe.

Background
In the past, Ryouko was involved in an experiment in which her body was split in two and the missing parts replaced with machines to create two separate cyborgs. After a year living apart, the two Ryoukos were recombined into one, with no split personalities or rejection, and retaining the memories of the time split apart. While Ryouko wished to test the compatibility between the cyborg technology and the human body, the institution she was working with also hoped to observe a possible side-effect - the creation of a "soul".

At some point afterwards, she created the Indian Poker cards which enabled people to record and view dreams, and distributed the method to produce them.

Dream Ranker Arc
Ryouko first appears in a Indian Poker card that Misaka Mikoto was using as she was searching for the Bust Upper card. Seemingly speaking to Mikoto directly she speaks cryptically of the future and that there is a threat that not only Mikoto cannot ignore, but also a threat that could lead to another one if Mikoto eliminates it.