Uesugi Family is the household of Isanari Uesugi. They are living a poor life and currently in debt. They reside in a small, run down apartment. All of the Nakano Quintuplets knew the address of the house, while only Itsuki ever go inside.
According to Raiha, Uesugi Family has a debt.
- Related Article: Uesugi Family's Residence
He is a top student who achieves excellent grades, but has a bland appearance, grumpy personality, sometimes rude attitude, and have no friends. Fuutarou is always serious and dedicated to his efforts, and occasionally pompous or mocking. He currently doesn't have an interest in dating.
Fuutarou's cheerful younger sister; being the only female and the most family-conscious, she is effectively the head of the small household. She cooks for the family. She is wise and thoughtful. Her cute facial expressions will often sway others' hearts.
A thrifty father. He has blonde hair, it is unknown whether it's natural or not, and young appearance. He is the one who usually jokes among the three, while both of Fuutarou & Raiha act as the straight man.
Unnamed paternal grandparents
The parents of Isanari. The grandfather is very strict on his son. When their grandson, Fuutarou, turned 17, they would no longer give him New Year Money.[no citation] They are present at the wedding of Uesugi and Nakano.
Unnamed maternal grandparents
The parents-in-law of Isanari. They are present at the wedding of the Uesugi and Nakano. It is implied that Isanari has not seen them for a long time before the wedding.