Sumikko Gurashi is a popular Japanese character brand created by San-X. It features a group of adorable, quirky characters that represent various feelings of shyness and introversion. Each character has a unique backstory, often reflecting a desire to hide or stay in the corner, which resonates with many people. The characters include Shirokuma, a polar bear who dislikes the cold, and Penguin?, who is unsure of its identity. Sumikko Gurashi has expanded into various merchandise, including plush toys, stationery, and even animated series, making it a beloved franchise among fans of all ages.