Юбіва Сосаку

Year 1, class A at Yubiwa Academy Middle School.

He is the heir and de facto president of the Yubiwa Foundation, the parent organization of the Yubiwa Academy. As a child prodigy with both financial and artistic talents, he is a member of the Detective Club's art team. He is expressionless and of few words, but only Manabu can read his thoughts. Usually only speaks twice in each book.