Blondie has no internal dialogue, she differs from everyone else, her erratic, loud and annoying personality stands out in a sea of characters with minimal dialogue. Yet we learn an equal amount about her due to her vulnerability: she is the one character who can communicate, the lack of communication drives the struggles in the film.
In SRS when commenting 'we used to date, i had long hair, you called me baby' revealing that she has based her entire appearance on his opinion, WKW connects relationships and identity.