A prosthetic leg?

That makes:
2 one armed guys
A mental handicap (Cloud after falling into lifestream)
A corpse
A talking dog
A vampire guy
A guy who wont stop smoking (soon to have lung deficiancy)
A test tube nutcase (Sepiroth)
And now a chick with one leg

Whats wrong with Tifa?
*Oh yeah, orthopeadic underwear...*