Galinda Upland

Glinda/Galinda, The blond who becomes "Glinda the Good" Witch

Both the novel and musical introduce Glinda as her younger self, Galinda Upland of the Upper Uplands, a blatantly self-centered young blond. Gregory Maguire disassociated her from an archetypal "good" to make her a pretentious goodie goodie. The musical's writers juxtaposed the two women who were superficially "bad (or misfit)" and "good" but underneath were nearly the opposite (until Glinda evolves as a person).

Source: http://www.musicalschwartz.com/wicked-characters.htm