A relaxed, straightforward, and energetic 2nd year middle school student. Her family owns a diner, and she is an only child. She has outstanding physical drive and gets hungry quickly. Her catchphrases are "Delicious smile~!" and "I'm hungry~!". She loves fresh vegetables. Yui cherishes her grandmother's motto, "food is smiles". With Kome-Kome's power, she can transform into Cure Precious, representing onigiri.