Nijika is an animal lover, especially dogs. Her special talent is being able to tell what type of a breed of dog is just by looking, which she showcased in Keyakitte, Kakenai. True to her love of dogs, she has a pet chihuahua named Lady-chan.
In August during a Showroom, Nijika assigned each Keyakizaka member to an animal, which she did with some of the members previously in Keyakitte, Kakenai. Before joining Keyakizaka46, Nijika was center of Daisy Girls, an underground idol group based in the Miyagi prefecture. She is also a fan of the Idol Street group GEM.
Back in high school, Nijika was part of the wind instrument club. Her favorite foods are strawberry, sunagimo and omurice. She is sweet, but lacks confidence, although she's making progress. She said she wanted to be like Kobayashi Yui: calm, composed and cute, but failed as once she tried not speaking anymore, her presence simply vanished instead.
Her audition song was Hana wa Saku (Hana wa Saku Project) and her favorite Nogizaka46 member is Shiraishi Mai.