(Not an actual NPC but a smiley face in the game, in the Maze.) You came across A smiley face on a brick wall, There was nothing interesting after exiting the elevator into the “Random Maze” floor, you shrug but before you could walk away, Wally Speaks

“O-oh! Well Nobody has ever stopped by before, Greetings maze dweller!”

Wally said sending her warm and silent smiles from the heart of the Mandrill