Light Foe

Description
Light Foe is a species of creature located within the Vault of Icarius Sanctum, trapped and concealed by Light Boss. They are small, light-yellow, head-sized, round ghosts with a single short tail and stubby fingerless arms and permanently sneering faces. Each of Light Foe was once a being of any other kind, such as human or monster, who became forcibly transformed into this shape and locked within the Vault. Eventually, every one of Light Foe will become increasingly naughty and misbehaved, but upon escape, will slowly revert into their original forms and personalities.

Powers and abilities
Light Foe are similar to ghosts, in that they can easily defy gravity and become intangible and invisible. Although they are fairly weak physically, they are nearly unstoppable in massive numbers, and so tend to travel in packs causing as much mayhem as possible.

History
Light Foe grew in number as Light Boss captured more victims, and eventually included so many members that even the Vault could no longer contain them. They burst out en masse and overwhelmed their captor, who was able to recapture every last one only with the timely arrival and assistance of the Fighting Polygon.

Miscellanea

 * Named, shaped, and inspired by the Nintendo character "Boo", a ghostly enemy who loves mischief