Also known as: 夢川ゆい, 梦川唯, マイ☆ドリーム, 夢川兄妹
Protagonist of Idol Time Pripara. Yumekawa Shogo's sister. As her name suggests, she is based on Yume Kawaii.
Yui has Purple Eyes and short Blonde Hair with curls, Sidelocks and Two Side Up Ringlets. She decorates her hair with a blue bow with a star in the middle and usually wears Avocado Academy School Uniform.
While inside PriPara, Yui grows taller and her hair reaches down until her waist. Her usual outfit consists of a purple Star Choker, a Star Necklace, a cropped Pink Jacket with Long Sleeves, a Purple Shirt with a heart print, a pleated purple Miniskirt with frills on the bottom, white Kneehighs and purple Shoes decorated with a Pink Bow.
Alternate universe counterpart: Gekikawa Yui from Kiratto Pri Chan of the same franchise.
Voiced by Date Arisa.