Sayori

"'I didn't know she'd do that!'""-Sayori apologizing for Monika's slap"Sayori is one of the four girls of the original Literature Club, and is the title character of the series. Despite that, she doesn't do much for the plot in Hospital Boarding. She was the girlfriend of Chris prior to her mysterious disappearance.

She disappeared without explanation in the middle of the night, between the events of the first and second days of Hospital Boarding.