Impersonating Duplicates and the Loss of Identity

The narrator shares their unsettling experience of encountering someone who looks identical to them and seems to be impersonating their life. They recount instances where this doppelganger imitates their voice and mannerisms, even going as far as to pretend to be them on phone calls with their mother. The narrator's desperation to prove their identity and the sense of unease they feel as they see their own reflection in their impostor's face highlight the theme of loss of identity.