Sayo Shinoyama is the second eldest granddaughter of Rozan Shinoyama. Currently unemployed, she lives at the Shinoyama mansion. Sayo is a NEET, meaning a young person who is "Not in Education, Employment, or Training," and can afford to be as such due to her family's wealthy standing. She may also be considered an otaku due to her obsessive interest in sharks, or specifically movies about sharks.