Shizuka's friend is an unnamed character in the series. She is commonly credited in the credits as Classmate (クラスメイト Kurasumeito) or Girl (女の子 On'nanoko, literally meaning female child), and is a background character of the series. She has been rumoured by fans as the wife of Dekisugi, due to her striking resembling to the wife and she was seen together with Dekisugi in one episode. Her most prominent appearance was in the episode Gravity Paint, where in she has a speaking role and treated as a supporting character in the episode.
She has brown curly hair. She commonly wears a yellow blouse with red skirt or orange skirt.
Her clothes sometimes follow a pattern. If she wears a red skirt she is usually wearing orange shoes with it, but if she wears her orange skirt she wears red shoes with it.
They were seen together in some episodes, notably Gravity Paint. They also appeared together in the 2005 anime episode Suneo is the Ideal Big Brother. They appeared together along with other girls in the 2005 version of Romance in the Snowy Mountain.
In the episode Trying to Goodbye, both of them went together to bid farewell to Nobita when he was going to transfer to America.
- In Gravity Paint and the 2005 version of Romance in the Snowy Mountain , she was given a speaking role.
- Chie Nakamura also voiced Hideyo Dekisugi.