Sakyo Furuichi (古市 左京 Furuichi Sakyo) is an actor working with the Mankai Company and a member of the Autumn Troupe. At first, he attempted to tear down the Mankai Company's own theater, due to the massive debt the company owes him. To prevent that from happening, Izumi Tachibana wrapped up a deal with him, under harsh conditions. For some reason, he is more familiar with the structure and history of the theater than the manager. After joining the group with a certain chance, he will show his skill as an accounting officer and make an effort to rebuild the theater company. He's brainpower that you can count on, but sometimes he's a little uncontrolled when it comes to saving money.

He initially had room 106 to himself before sharing it with Azami Izumida in Act 2.