Riggan's daughter and recovering addict, who serves as his assistant to help them reconnect. She confronts him about his vanity and drug use, supports him during the viral Times Square incident, manages his social media, and cares for him in the hospital after his stage accident.
Riggan is Sam's biological father and attempts to rebuild their strained relationship through her role as his assistant.
Sam and Mike develop a secret romantic connection that complicates the production dynamics.
Sam and Jake collaborate professionally on the production, maintaining a working alliance.