Hinako had chin-length black hair that has small bangs hanging above her eyebrows, blue eyes, she had a mole on her neck that is similar to her daughter  and she highly resembled Tamako Kitashirakawa.
In high school, she was often seen donning a sailor-styled uniform.
As a teenager, Hinako was a polite girl and revealed to be bashfully modest. Following Mamedai Kitashirakawa's confession to her, she had immediately scurried away, but she reciprocated his romantic feelings despite that .
In her short life, Hinako was a loving and supportive mother to her children whose kind and open-minded nature was apparent in her patient attitude for Mochizō Ōji's teasing towards her daughter as she reassured the latter that he only did so because he had a crush on her .
She acted as the imparter of these values in the Kitashirakawa household with a contrary, yet caring husband, and continued to be viewed in a positive, fond light after her death and the figure Tamako Kitashirakawa would base her values off of in her teenage years .
- Hinako's surname Kitashirakawa means "north" (北) (kita), "white" (白) (shira) and "river, stream" (川) (kawa).
- Hinako was skillful at the baton .