Well that's actully what U+008B (PLD, Partial Line Down) and U+008C (PLU, Partial Line Up (though officially it's inexplicably Partial Line Backward)) were orig

Well that's actully what U+008B (PLD, Partial Line Down) and U+008C (PLU, Partial Line Up (though officially it's inexplicably Partial Line Backward)) were originally for: PLD text PLU would produce a subscript and PLU text PLD would produce a superscript.