上杉 らいは

Fuutarou's cheerful younger sister. The only female in the family and the most family-conscious, she is effectively the head of the small household. Her cute facial expressions will often sway others' hearts. Appreciating the hard work Fuutarou does for their family, she sometimes delays supper until he returns home so she can prepare his favorite meal.

In Go-toubun no Hanayome: Gotopazu Story, she plays the role of the navigator.