The white cat is Sakata Gintoki (well, it's a cat, or a pair of domineering dead fish eyes ~)

This black cat is Katsura Kotarou.

And Gui became cats for some obscene reasons, and met Fang Yi, the owner of kabuki cats. Later, in order to save Fang Yi and the captured wild cats, he fought with Ambassador Mu Dixing and Kabuki Gopher.

As for the tail, Gui dragged his tail down and regarded it as a light beam sword (forced vomiting), and then Gui took it off as a sword.