Age: 31
Height: 175 cm

Kazue is Souta's eldest sister. She is a lawyer and has the tendency to hit Souta with a law book.

She was once married to Minegishi until they divorced.

After Minegishi awakens to the fact that it feels the best when he gets hit by Kazue, he comes to her office while in working hour and forces her to agree on a remarriage.