The Bunny's only appearance so far is the salesman for the eleven DLC games and the StreetPass Premium Update. A Wandering Hero summoned by another hero also takes the form of a rabbit, similar to the bunny. She mainly tries to get the player to buy the games, and she explains them in detail. She has a yellow tablet, with a black screen, and she uses it to show you screen shots of the game she is selling. The Mii character playing the game is herself.
The bunny resembles a Mii wearing a white dress and that has a rabbit's head.
If the player rejects her offer to buy a game in most regions, the bunny will say "Oh, I see..." But in Europe she says "Fair enough!" This is because of a law in Europe prohibiting pressuring purchases in video games.