There’s even a scene where Homelander has a brief sexual encounter with his own picture. He was first seen in season one, disguised as Madeleine Stilwell ( Elizabeth Shaw), the Homelander often used the Doppelganger to represent his wildest and most disturbing fantasies.
As their name might suggest, Doppelganger ( Dan Darren Zanko) can change shape and take on the shape of anyone he wishes, as well as being able to completely imitate his voice.