Uruoi-chan appears as a pink, feminine sprite representing skin lotion in most media, though certain manga volumes depict her as a pink lemonade sprite. She lives in the Shizuku Forest Department Store with her two sisters, Shampoo and Rinse, who run a beauty salon. Her personality revolves around a passion for fashion and pretty things, combined with a tendency to develop frequent crushes. Her primary romantic interest is Shizuku-Chan, sparked instantly when she first met him.

A key demonstration of their unique bond occurs when Shizuku becomes trapped in ice, remaining frozen despite rescue attempts; Uruoi-Chan's kiss alone successfully thaws him. Beyond this relationship, she shares close friendships with Mirumiru, whom she often babysits, and the snail Tsumurin, with whom she frequently shares opinions.

Uruoi-Chan possesses the distinctive trait of being tone-deaf; her singing consistently causes discomfort or annoyance among other forest inhabitants. Visually, she features a pink droplet form adorned with a tilted red ribbon on her forehead and sports three upward-pointing eyelashes on each eye.

In the human reimagining *NiJiRo Fairy Shizuku-chan*, she is portrayed with pink hair and wears a one-piece dress. Her name originates from the Japanese word for "moisture," reflecting her core essence.