Born into an extremely traditional household in the countryside, Rei was raised and trained to become an Itako due to her blindness. She gained recognition after people decided to ask a spirit medium like her to solve a murder, resulting in more visitors to her house, and thus, she eventually earned the title of the Ultimate Itako at Hope’s Peak. Rei may be cute and bubbly, but she surprisingly has a god complex of sorts, unwilling to talk to others if they aren't as talented as her.