Sonia is one of the characters in Unwind who provides hope for the future survival of the social misfits. Not only does she help Unwinds escape, but she is also presented as an old woman who has been engaged in this subversive work for some time. She gives him and Rita practical, if slightly off course, advice, as she believes the baby they are carrying is theirs: to get pregnant again, as the authorities will not unwind pregnant women. She is a tough-talking, but tender-hearted survivor, who risks her life to help younger people escape as part of the network with Hannah, the teacher.
Sonia is generally associated with the positive values that the society formerly had in that she operates an antiques shop, which seems to Connor to have things from all phases of American history. She also harks back to a specific time in US history, prohibition, as the secret hideaway in the basement of her shop had been used to hide illegal liquor. Now she keeps it stocked with food and supplies for the escapees who hide there while waiting for transport in the ice cream truck.