Until now I could never have imagined all these “metamorphoses”.’
Metamorphosis is somewhat important to how these people progress within the narrative. The whole story is about a revolution; a turning; metamorphosis. It has been a pattern that Stavrogin is a catalyst for these metamorphoses: Shatov and Kirillov, Pyotr (he frames Stavrogin as the international founder of their revolution and very well may truly think of Stavrogin as that), and the three women Stavrogin has associated with.