Itsuki Nakano is one of the five main heroines in the anime series 'Go-Toubun no Hanayome' (The Quintessential Quintuplets). She is the fifth sister of the Nakano quintuplets and is characterized by her serious and diligent personality. Often seen with a strict demeanor, Itsuki is focused on her studies and has a strong sense of responsibility. Despite her initial coldness towards the protagonist, Futaro Uesugi, she gradually warms up and becomes one of his closest allies. Her role in the series involves navigating her complex family dynamics and personal growth, making her a pivotal character.