Yuba

The chief of her village and the leading pharmacist, famous in the surrounding villages as the person with the vastest number of connections. The grandmother of Ruri, who's been under her care since her parents died. With the exception of Ruri, most of her other relatives have passed away.

The paternal grandmother of Rio, she's the only of her son (Zen)'s relatives that was told the truth about his elopement with Ayame