Shu-kun is an apprentice Gyoza-Dumpling maker at Pankichi-Ken.
Even though his ambition is to become a Dumpling Chef like Gyoza-Otoko,
the hat he is always wearing is "Shumai Hat".
Once, his hat's resemblance to Shumai-Dumpling was mentioned by Gyoza-Otoko.
So agitated, Shu-kun made a "Gyoza Hat".
Unfortunately, however, the "Gyoza hat" was not well received by Pankichi,
so he went back to his old "Shumai Hat".