病弱

Toki Onjoji is the ace of Senriyama Girls' High School, the second-ranked school in the country. Her power is that of foresight. She is a sickly and quiet girl. When she was on the brink of death in her second year of high school due to her illness, she gained a cool and aloof aura, however, she is still the same serious, bright and lovely girl at heart. Her partner in the club is Ryuka Shimizudani, her friend since 5th grade.

People often say that "there is a price to pay for being too smart". Ever since he was a boy, Ichinose paid for it with his weak and frail body which made him prone to sickness. His world view is rooted in science and he believes that everything can be explained through scientific methodology. Once upon random change, Ichinose happened upon the Mahjong Soul Shrine. He thought that this was a very interesting game of probabilities, and so he decided to join in.