Nagomi Kinoshita is initially presented as a stoic and reserved individual, particularly when it comes to matters concerning her health, she dislikes being the center of attention during such times. However, she becomes highly emotional when it involves her grandson, Kazuya Kinoshita, especially regarding his romantic relationships. She is often moved to tears out of joy when she believes Kazuya has found a girlfriend or when that girlfriend makes an effort to visit the family.

Despite her age, Nagomi is full of energy and possesses a warm, affectionate nature. She enjoys doting on those close to her, whether they are family members or trusted acquaintances. She also has a surprisingly youthful spirit, with interests that align with modern trends such as idolizing a video game character and frequently engaging with mobile games. She often bothers Kazuya with her in-game problems, much to his exasperation. Additionally, she maintains a Twitter account where she shares updates about her liquor store and her daily life.

While she is frequently portrayed as overenthusiastic and expressive, Nagomi is capable of showing a calm and firm attitude when faced with serious situations.

Nagomi Kinoshita is a slender, sharp-featured elderly woman who carries herself with elegance and grace. She typically wears her gray hair tied up in a neat bun, adding to her refined appearance.

She is most often seen dressed in traditional Japanese clothing, such as kimono or yukata, reflecting her appreciation for cultural heritage. Interestingly, she is often surrounded by modern technology, creating a visual contrast between her classic attire and her contemporary hobbies.

At first glance, Nagomi appears stern and composed, but her expression quickly transforms when she becomes excited or emotionally engaged revealing a cheerful, lively personality beneath her dignified exterior.

Nagomi Kinoshita is the co-founder and owner of Nagomi Sake, a family-run liquor store that has been passed down through generations. Alongside her now deceased husband, she helped establish and maintain the store as a respected business within the local community. Even in her later years, Nagomi remains actively involved in its daily operations, showcasing both her entrepreneurial spirit and her strong work ethic.

She is the mother of Kazuo Kinoshita and the grandmother of Kazuya Kinoshita, whom she adores deeply. Following the death of her husband, Nagomi has taken on the role of the family matriarch, offering guidance and support to her family especially Kazuya, whose love life becomes a central concern for her.

After mistakenly believing that Chizuru Mizuhara is Kazuya’s real girlfriend, Nagomi quickly becomes attached to her, charmed by Chizuru’s beauty, politeness, and seeming devotion to her grandson. Her affection for Chizuru becomes so strong that she frequently encourages their “relationship,” unaware that it is a rental arrangement. This misunderstanding creates ongoing complications for both Kazuya and Chizuru, as they struggle to maintain the façade for Nagomi’s sake.

Despite occasional health issues, Nagomi continues to live with vitality and curiosity. She embraces aspects of modern life, such as mobile gaming and social media, maintaining a Twitter account to promote her store and share glimpses into her daily routine.

The given name Nagomi (和) means “harmony” or “peace,” reflecting her warm and nurturing nature as the matriarch of the Kinoshita family.

Her surname, Kinoshita (木ノ下), combines ki (木), meaning “tree” or “wood,” and shita (下), meaning “under” or “below.” The name can be interpreted as “under the tree.”