Height: 159 cm (5'2")

Second sister of the Nakano quintuplets. She usually acts as the mother of the family, she cooks for them and takes care of their medical needs. Among the five sisters, she is the one who has the highest hostility towards Fuutarou and often rebels against him.

Nino has a sharp tongue and talks bluntly when confronting the others, even if the other party is her sister. She has an outgoing attitude and is socially aware, resulting in her having many friends. She is a scheming person and doesn't hesitate to use underhanded methods to achieve her goals.