Minami is Tomoko's second year classmate, but they have not interacted yet.
Minami has shoulder-length hair that curls at the ends. She wears two triangular hair clips on either side of her head. Her eyes are angled like Yoshida's but Minami's irides are larger, giving her a softer and friendlier appearance. In contrast to her softer appearance, she is drawn with a fang.
Mako and Minami are friends. They ended up being in the same group during the school trip. Between the two, Minami seems to be the one taking a more active role in the friendship as she is the one who asked Mako to be part of her group. She also takes notice of Yuri's absence and invites Mako to lunch in chapter 99.
Yuri and Minami have not been shown interacting as of chapter 99, but there are hints of them not being friends. In chapter 69, Minami invited Mako into her group for the school trip but did not invite Yuri. In turn, Yuri tells Mako to leave Minami's group without hesitation.