Futaba Yotsuba, affectionately known as Fuu-chan, is a supporting character in the anime series 'Delicious Party♡Pretty Cure.' She is the younger sister of Yui Nagomi, the main protagonist, and is known for her cheerful and curious personality. Fuu-chan often serves as a source of motivation and emotional support for Yui, helping to ground her sister during challenging times. Her innocent and positive outlook inspires those around her, making her a beloved character in the series.