Boris Airay (ボリス＝エレイ) is the Cheshire Cat and lives in the Amusement Park. He is usually seen with a cynical smile and loves riddles. Whenever he sees Pierce he gets hungry and will chase him with a knife and fork. He can jump through doors from one point to the next, an he can even create his own doors. 

The best immediate description of Boris is that he "is a cat," as he himself puts it. He does not easily grow attached to anyone- this includes Alice. Whatever he finds interesting he plays around with, and whatever he does not find interesting he ignores. Initially his interest in Alice was nothing beyond curiosity, and it isn't until he interacts with her more that they can become friends. He loves guns and fiddling with machinery, although often times he makes things more dangerous instead of better. Chasing mice (particularly Pierce) is a fun past-time for him, and he very much loves fish foods.

Boris loves riddles and is clever; however, he does not like trying to see from another person's point of view, nor does he like accepting blame.

Boris's voice should be mid range