When the word "Wicked" comes to mind, you'll probably think of Elphaba, who's compelling story of rejection by society overshadows (and rightly so) many other characters.
Failing that, your mind would most likely drift to the lovable airhead that is Glinda Upland, and her famously careless quips.
You might think of Fyiero, or Boq, perhaps even Madame Morrible.

But the character which will always have a special place in my heart, is- surprisingly-
Nessarose Thropp.

Created mainly to serve as a tool for Elphaba's developement, and to fill the "who's the wicked witch of the east?" hole in L.Frank...