Austin is a sophomore at River Valley and a fifth-generation Deaf person on his mother's side. Growing up immersed in Deaf culture, he is self-assured and proud of his heritage. Austin's life becomes complicated after his sister, Skylar, is born and diagnosed as Deaf, leading to family tensions regarding a cochlear implant decision.

February is the headmistress of River Valley School for the Deaf and a CODA (Child of a Deaf Adult). She is passionate about Deaf culture and deeply committed to her students. She faces personal challenges, including the anticipated shutdown of River Valley and dealing with her mother's declining health and eventual passing.

Victor and Lynnette are Charlie's divorced parents. Victor has custody of Charlie and actively supports her enrollment in a Deaf school, while Lynnette is opposed to Deaf culture, preferring that Charlie acclimate to the hearing world through a cochlear implant and speech therapy.

Beth is a fourth-generation Deaf person committed to Deaf culture, while Henry, her hearing husband, is a sign language interpreter immersed in the Deaf community. Their family faces challenges when considering a cochlear implant for their Deaf daughter, Skylar.

Mel is February's wife, living in Ohio with her and her mother-in-law. Although Mel does not sign, she participates in Deaf community events and faces personal issues related to February's past relationships.

Slash, formerly known as Kyle, is a recent high school graduate and a politically active individual. He reconnects with Charlie and learns to communicate with her using sign language, showcasing his caring nature and commitment to social justice.

Kayla is Charlie's roommate at River Valley, a Black Deaf student from a working-class background. She faces racism within the Deaf community and plans to attend Gallaudet University, determined to advocate for more inclusivity.

Skylar is the youngest in the Workman family, initially born hearing but later diagnosed as Deaf. Her situation emphasizes the family's Deaf pride and the controversial decision about cochlear implants.