Callie Adams Foster (portrayed by Maia Mitchell; seasons 1–4),[1][2][3] is a recent graduate of UCSD Law School and Mariana's adopted sister.
She leaves to join the ACLU in Washington, D.C., in the second episode of season 4, though she has spoken to Mariana occasionally through web chat.
Callie returned to the Coiterie in season five to support Mariana after Evan was shot by Silas Thompson's minion Adam and give her advice when she is made the acting CEO of Speckulate.
Mariana Adams Foster (portrayed by Cierra Ramirez[1][2]) is a software engineer and Callie's adopted sister who recently graduated from MIT.
Malika Williams (portrayed by Zuri Adele) is a bartender and political activist who lives with Callie and Mariana in the Coterie.
Joaquin Peréz (portrayed by Bryan Craig; season 4[11]) is a mysterious new resident to the Coterie and investigative journalist who is looking for his estranged sister Jenna.
Bryan (portrayed by Michael Galante; season 1) is an event planner at the Standard Hotel who is gay.
Evan Speck (portrayed by TJ Linnard; seasons 1-5) is Mariana's boss and the CEO of Speckulate.
Kate Nguyen (portrayed by Dianne Doan; season 1) is a judicial clerk for Judge Wilson.
Rachel Boyle (portrayed by Maisie Klompus; seasons 1-4) is Marianna's friend and business partner for Bulk Beauty.
Claire Badgley (portrayed by Seri DeYoung; seasons 1-4) is Marianna's friend and business partner for Bulk Beauty and Raj's new girlfriend.
Gina Spero (portrayed by Rachel Rosenbloom; seasons 1-4) is Marianna's friend and business partner for Bulk Beauty.
Cary Plack (portrayed by Amin El Gamal; season 2) is a research assistant at Legal Aid.
Gwen Tuckerman (portrayed by Nicole Lynn Evans; season 2), a research assistant at Legal Aid.
Silas later snuck into the Coterie and carefully got information from Mariana's room while also stealing the doll of Callie.
Callie later visited Silas and gave him a restraining order to stay away from Marianna as he claims that he was not responsible for the disappearance of a former worker on his farm.