Boe

A Boe is an enemy creature from The Legend of Zelda: Majora's Mask on the Nintendo 64. They're considered to be a ghostly species, though seeing that not an awful lot of information is known about them, this can't exactly be confirmed. They're clever creatures who use their environments around them to their advantage. For example, you'll only find black Boes in dark areas, and white ones in the snowy levels of the game.