Kathryn 'Kitty' Pryde, one-time youngest member of the
legendary mutant team known as the X-Men. Her power was known as Corporal Intangability, which would let her 'phase' her molecules through any solid object, effectively passing through it like a ghost. Formerly known by the
code names 'Sprite' and 'Ariel,' she later went on to be a founding member of Britain's premiere superhero team,
Excalibur.