The treasurer of the student council of the Shuchiin Academy. He's extremely valued by Miyuki, given that he single-handedly manages all the school's funds. He's also terrified of Kaguya, though no one else is sure why that is. Yuu keeps to himself and rarely speaks up, often getting into trouble when he does. He has a depressed outlook on life while having an inferiority complex. In contrast to his attitude, he is willing to help those in need and will sacrifice his pride if need be. Unlike his high school self, he had a much different outlook and demeanor during middle school.