Teru Kōnokura is the official wife of the prominent Kounokura family and stepmother to Miya Nakamura, whom she took in after the death of Miya's biological mother. She is the biological mother of Marika and Arisa Kounokura.

Teru carries a strong gravitas and uncompromising attitude, marked by high standards and an intense, intimidating aura. Her presence can make others break into a cold sweat and easily commands respect even from her own formidable daughters. She maintains an elegant and dignified demeanor, often appearing in traditional kimono that reflects her status as a lady of a powerful Japanese family. Her style includes purple eyeshadow and kimono, colors associated with power.

Beneath her formidable exterior, Teru is reasonable and caring. She adopts Miya, an illegitimate child, into the main family despite the social complications such an act typically carries in Japan. She works to provide Miya with a stable and fulfilling life, helping her adjust to her new station and develop self-worth. Teru expects all her daughters to treat the household staff with respect and models this behavior herself as a benevolent employer who earns deep loyalty.

She is a loving mother to both her biological and adoptive daughters, constantly encouraging them to be their best while recognizing that each grows at her own pace; her ultimate wish is for their happiness. She reassures her eldest daughter, Marika, about the high expectations placed upon her, expressing belief in her potential. Teru does not hesitate to admonish those who lack decorum or taste, yet she believes in adapting to circumstances with grace.

Her expressive nature is notable, as she exhibits a large ham personality and is unreserved in showing her feelings. In one instance, she carefully embroidered the edges of a cherished handkerchief that belonged to Miya's deceased mother to prevent fraying, adding a border of flowers to the keepsake.