Yuko is fourteen years old like Shizuku. She is tall, and has brown eyes and brown hair, which she wears in two braids. She wears a Japanese junior high school uniform. In the beginning of the movie she wears a blue sleeveless dress and a floppy hat with a purple band.
She has a huge crush on Sugimura and is a really good student and likes to tease Shizuku after Shizuku acts weird around Seji. She is a good friend, but gets annoyed with Shizuku sometimes.