San-X and Sanrio are companies that make kawaii characters such as Tare Panda, Hello Kitty, My Melody, and Rilakuma. They used to be all one group but they separated. Even though they are separated, their characters that they make are adorable. In Sanrio, most of their characters belong in one group, which is the Hello Kitty group. For example, Kerropi is the green frog from Sanrio. He is a friend of Hello Kitty. Chococat, the black cat, My Melody, they bunny with the pink hat, the Star twins, the human looking characters, and etc. are also Hello Kitty's friends. On the other hand, San- X has only one group and the rest are individuals.
Pusheen is a fat cat. He is very smart. For example, he has a nice way of getting food, see Blog. He also has many definitions of lazy.