Shizuku, originally named Shizuku (しずくちゃん) but sometimes called "Zucky," is a raindrop sprite born when a raindrop fell from a cloud. She inhabits Shizuku Forest, a place inspiring her name alongside the Japanese word for "a drop of rain." Her birthday falls on April 29. Rain triggers her happiness, manifesting as rainbows appearing on her forehead. Daily life involves playful adventures with schoolmates, friends, and family throughout Shizuku Forest. In the spinoff *NiJiRo Fairy Shizuku-chan*, she assumes a human form featuring blue hair and a sailor suit adorned with a brooch shaped like her pre-transformation face.