園部 空

Hikari's older sister. Works as a tour guide at a bus company. Along with having beautiful looks and a large chest, she possesses a strong core and is trained in self-defense. Due to being seven years older than her sister's trio of friends, she has watched over them since she was in middle school. While she is generally very popular with her colleagues, superiors, and customers, she tends to be rather harsh toward Makio. Currently, she is engaged to her coworker Ryou Isezaki, and the two are scheduled to be married in November.
She has secretly been in love with Makio since they first met, but has refused to act on her feelings due to the age difference between them. Her aloof demeanor when interacting with him is due to embarrassment rather than dislike. She has tried many different things to attempt to overcome this longing, but they have all only resulted in her adoration deepening further. Her concern for her sister and Makio's well-beings eventually pushes her into uncovering Seiji's plot, and the actions she takes to protect them both drive much of the later parts of the story./