The phrase refers to digital images featuring Sanrio characters (such as Hello Kitty, My Melody, and Kuromi) in Halloween-themed designs, specifically formatted for use as backgrounds on computer desktops. These images typically incorporate elements associated with the Halloween holiday, including pumpkins, bats, ghosts, and autumnal color palettes, alongside the distinctive aesthetics of the Sanrio brand.
Such decorative graphics provide a seasonal customization option for personal computers, reflecting individual interests in both the Sanrio franchise and Halloween festivities. Their popularity stems from the appeal of visually updating digital spaces to align with cultural events, fostering a sense of personal expression and enjoyment. The availability of these images has grown alongside the expansion of digital art and readily accessible image repositories, allowing users easy access to a wide variety of themed options.