Dormouse

The Dormouse (眠りネズミ, Nemuri Nezumi, literally meaning "sleeping mouse") was Wonderland's informant, and, due to a contract with the White Rabbit, he could give any information he had to whoever is named Alice. He may have found about how to exit Wonderland, since he held the most information about how to leave. He was an old friend of the Mad Hatter as well as the Dodo.