From Wikipedia commons - the image has been used to promote the brand.
Hello KittyTM is trademarked brand of the Japanese company Sanrio. It is based on the fictional kitty character of the same name. She is a white Japanese Bobtail cat. A highly cute cat. Sugary sweetness is the Japanese style for kids it seems to me. But they are very popular with children.
Here are two examples of products from the Hello Kitty range:
This is the Sanrio shop.
The founder of Sanrio, Shintaro Tsuji, discovered early on that cute designs helped to shift products. This led to the cute image of the Japanese Bobtail cat that was designed by Yuko Shimizu. It was added to the design lineup as early as 1974, and Hello Kitty made her debut in the USA in 1974.