Zacharie is kind of like the merchant who appears randomly. he eventually takes The Judge's place. when he does, from time to time, his mask changes from a frog mask to a cat mask. thats the only thing that changes appearance wise. his mask changes to a frog if he's selling things. other things, he has a cat mask. when you 'purify' all the zones your sent to "The Room". i wont spoil any more >:3