Uesugi, Fuutarou

上杉風太郎

Fuutarou Uesugi serves as the series' main protagonist. He is a serious, hardworking high school student and a prodigy ranking at the top of his grade. For financial reasons, he is tasked with tutoring the Nakano Quintuplets.
According to Isanari, Fuutarou resembled his father in childhood, possessing a wild personality and struggling with studies. He currently leads a frugal life, preferring solitude. Someone remarks that Fuutarou is always like this, attempting to avoid associating himself with everything. Ichika notes that Fuutarou is direct and does not mince words. Yotsuba's first impression of Fuutarou is that he is a gloomy man with few friends. His facial expression remains consistently serious; he sometimes appears grumpy and annoyed, and he rarely blushes or becomes flustered. Fuutarou believes that serving as Class Representative would only hinder his studies.
Fuutarou is noted for having a large ego and high confidence. He can be rude and direct, yet he is actually capable of containing his emotions. Despite this, Fuutarou could momentarily lose his composure when agitated and confronted with unfavorable circumstances. He also dislikes getting involved in other people's problems, as he finds it troublesome.
Fuutarou has been shown to be very hardworking and patient, as he is able to tutor several girls with below-average scores. It is personally stated and implied that Fuutarou currently has no interest in romantic relationships. He considers love to be something silly.
Raiha describes Fuutarou as an "overconfident" guy and a "study freak".
Nino encourages Fuutarou regarding his future love life, despite labeling him a tactless guy. Ichika also said the same thing when she visited him in the hospital.
Fuutarou has a habit of covering his mouth with his left hand when he feels embarrassed.