Natsue Tachibana

Ryoki's mother and the undisputed "queen" of the company housing complex. She delights in manipulating the lives of those beneath her, starting malicious rumors and relocating workers based on their family's reputation. Multiple times she tries to separate Hatsumi and Ryoki, seeing Hatsumi as unsuitable and undeserving of her son. Natsue is presumably obsessed with controlling the people of the complex because she has almost no control in her own family (Ryoki never listens to a word she says and rebuffs her concerns with no emotion, and Shuichiro, in his rare appearances, easily undermines her at every turn). Natsue and Shuichiro are in an arranged marriage due to the wishes of their parents (Wiki).