Nadeshiko Matsudaira is the 24-year-old police chief of Sakurashinmachi Police Station, holding the hereditary title of "Town Magistrate" passed down since the Edo period. She possesses a youthful, slender build, light skin, long black hair with curled ends, and grey eyes typically depicted as squinted. Her standard attire includes a blue police shirt, green armband, tie, skirt, hat, and long socks or leggings in animated depictions.

Initially, her gentle and approachable demeanor often leads others to underestimate her authority. However, she demonstrates decisive leadership during emergencies and commands strong trust from her subordinates. She maintains long-standing friendships with V Juri F and Noriko Shiina since high school and actively pursues a relationship with fellow officer Shidou Mizuki, guardian of twin vampires Kana and Mina.

Nadeshiko expresses self-consciousness about her small bust size, particularly troubled by her inability to hold items like a USB memory stick in her cleavage. In combat, she displays exceptional proficiency in swordsmanship using a bamboo sword, far surpassing the skill level of Iruka Kujouin.