Sayoko Yamazaki, a Kyoto waitress, becomes central to the Mobile Shinsengumi’s efforts to deter Ryunosuke Sakamoto’s return to Shanghai. The group engineers schemes to kindle a romance between them, believing this bond would anchor Ryunosuke in Kyoto. Their strategies repeatedly falter through miscommunication, situational chaos, and external interference. The matchmaking originates from concerns over Oryou’s emotional reliance on Ryunosuke, but shifts as internal group dynamics evolve—spurred by Kaoru Okita’s burgeoning feelings for Ryunosuke and the arrival of Lan Lan, a figure tied to his history in China. Sayoko’s background and motivations remain undefined beyond her role in these subplots, her interactions secondary to core conflicts involving monster regulation, the Tsubame Group’s hostilities, and the Shinsengumi’s interpersonal tensions.