At the heart of Wicked is the friendship between Glinda (Ariana Grande) and Elphaba (Cynthia Erivo), who will eventually become the Wicked Witch, but it took a dance to finally get there. The two blossoming witches were not always friends. In fact, they got off on the wrong foot upon meeting at Shiz University. What doesn’t help is that the rest of the school puts Glinda on a pedestal and hates Elphaba because of her green complexion.

https://screenrant.com/wicked-elphaba-dance-glinda-explained/