What is the cheshire cat personality?

The cat is sly, mischevious and completely mad, but he is very rational about it, as shown in the quote where he explains his madness to Alice, which you can easily find on the Internet. He enjoys tricking and confusing people, and he is one of the very few versatile characters, meaning that he wanders freely about Wonderland as much as he pleases, and it doesn't seem odd for him to so.