Brilliant but vengeful doctor who joins the Batwoman trio.
Their prior acquaintance supports their coordinated vigilante partnership.
Kathy and Sonia met in college art classes and later worked together as two members of the Batwoman group.
Batman is the formative inspiration behind Sonia's vigilante identity and career choice.
Sonia creates the Batwoman persona as a tribute to Batman, who saved her life nine years earlier and inspired her to become a police officer.
Sonia gives the group its public identity and later accepts responsibility for the operation.
The film reveals that Sonia is one of the three women behind Batwoman and that she created the persona.
Their shared living history predates their cooperation as Batwoman.
The film states that Sonia and Rocky were roommates.
Sonia's vigilante actions are motivated by a personal grievance against Thorne.
Thorne burned down a store owned by Sonia's family, and Sonia later helps target his criminal operation.
Sonia's alliance with Kathy places her against Carlton despite his later change of allegiance.
The women harbor grudges against Carlton because his gang war caused Kathy's mother to be killed.
Explore the full interactive character relationship map of Batman: Mystery of the Batwoman