Yotsuba Nakano

She is the fourth sister of the Nakano Quintuplets, and one of the main characters of the Quintessential Quintuplets series. Having a cheerful and energetic personality, she has a strong tendency of helping people out. Yotsuba is an active and easygoing girl. She is a type of person who can't say no to people who need help. She is also very physically fit, and is capable of tasks that her sisters can not do. She has excellent endurance and is great at sports. She's the only sister with excellent eyesight. She has a good sense of smell and a green thumb. Though she's great at physical activities, she has the lowest score out of all of her sisters.

Yotsuba is the only sister who accepts Fuutarou since the beginning and wholeheartedly supports him in everything.