Shizuku is a movie-exclusive character of Precure Dream Stars!. Shizuku is a blue fox who lives in the world of Sakuragahara and is Sakura's best friend.

~!After Sakura managed to escape from Sakuragahara, Shizuku was transformed into Samidare by Karasu Tengu.!~

When they exit the door of light, there lies a sparkling and glittering mysterious world. And there, they meet a lone young girl. What will happen to the Precures in this world enveloped by cherry blossom trees in full bloom!? This spring, it's not an All Stars, but a completely new story that is beginning. 
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(Source: Anime News Network)