Voice-type: Medium to medium-low

Kazuya's grandmother. At first glance, Nagomi is a stoic person who doesn't like it when too much attention is centered on her when she has health problems and she is very emotional when the topic of Kazuya's relationships comes up. She cries either because she is very happy that Kazuya found a girlfriend or because the girlfriend came to visit and other situations related to those matters.

She is also a very spoiling woman and energetic. She loves to spoil anyone who is close to her, whether they are her family or her cherished acquaintance. Despite being an elder, she has the heart of a modern age otaku, going as far as idolizing a game character and often to brag her problem towards Kazuya, much to his annoyance. She also created an account on twitter to show the progress of her store and lifestyle.