Hosaris is current head of the Shimen house. He's the older brother of Toruma Shimen. He's also manages the Shimen's family scroll workshop.
Hosaris has a hooked nose, wrinkled brow, well-cared mustache, and properly swept-back deep blond hair. There's strong will from his eyes overflowing with vigor.
Hosaris thanks Satou for saving his brother and his family, when they finally meet. As a show of goodwill, he gives Satou preferential treatment in visiting his family's scroll workshop. He further offers advice and more disconcerting information about the third prince who Satou was having problems with.