Natsumi Komiya is a supporting character in the anime 365 Days to the Wedding. She is a twenty-three-year-old employee in the planning department of the JTC travel agency, working alongside the main characters Takuya Ohara and Rika Honjoji. Natsumi is known for her cheerful and energetic personality, often acting as the mood maker of the office. She is friendly and sociable, getting along well with both male and female coworkers, and she enjoys making those around her smile. Her lively energy and easygoing nature make her a pleasant presence in the workplace.

Natsumi has a keen interest in romance and marriage trends. She frequently shares lighthearted gossip, wedding statistics, and recommendations for popular date spots, and she keeps up with the latest fashions. Her observant and perceptive nature leads her to notice details about her colleagues’ relationships, including the fake engagement between Takuya and Rika. Although her curiosity is genuine and not malicious, her casual questions and trend-focused chatter can create unintentional pressure on the main pair to maintain their pretense.

Natsumi values being included in social activities and dislikes being left out of trends or experiencing social awkwardness. She enjoys socializing after work, planning trips, and discussing fashion with her coworkers. Her role in the story is primarily that of a supportive colleague who adds a sense of normalcy and lightness to the office environment. She does not undergo major personal development over the course of the series, instead serving as a consistent, fun-loving friend who embodies the social expectations and romantic ideals that contrast with the protagonists’ more reserved personalities. Notable abilities are not emphasized, but her social perceptiveness and trend awareness are her defining traits. She has brown eyes and brown hair, and her appearance is described as fashionable.