The Sio (シオ Sio) is an Aurum enemy introduced in Kid Icarus: Uprising. They at first appear to be a cluster of blue and green bars. When approached, they fire a large, flat black hole in front of Pit that both fixes him to the spot and makes it hard to see. If it is not escaped by rapid dashes or dodges, the Sio will either expand and shoot a powerful laser through the black hole's middle, or switch to its side and charge at Pit while spinning wildly to inflict damage.
"An Aurum enemy that looks like nothing you've ever seen before. They rob their foes of sight and mobility with black-hole shots. Try to escape from these traps before they can hit you with their lasers and body blows!"
- Although the idol description clearly states that the Aurum Sio "looks like nothing you've ever seen before", its attack pattern and animations are very similar to that of the Underworld's Shelbo.