Hisato Azuma is the central character of the 2021 adult anime (hentai) OVA Himawari wa Yoru ni Saku (Sunflowers Bloom at Night), which was adapted from a best-selling 2017 doujinshi.

She is initially introduced as a loving, grounded woman who enjoys a happy and stable marriage with her husband, Norihito. The couple is looking forward to their future and actively planning to start a family. Visually, she is characterized by her long brown hair and brown eyes, most frequently seen wearing professional office lady (OL) attire, including a tailored suit and pencil skirt.