Cass provides disciplined long-range fire, estimates the final defenders, and holds the command junction after pulling the wounded Juarez out of the kill box.
Cass reaches command beside Juarez and accepts his tactical placement at the platform's right corner. As armored loyalists rise through the shaft, she fires carefully on single-shot mode at extreme range because training gives even light rounds a chance to find weak points. Holden floats extra magazines to her, and she acknowledges without breaking aim.
After Naomi's elevator strike and Clarissa's opening of the command airlock, Cass follows Juarez into the planned rush. Immediate concentrated fire hits her point man three times. She and Holden grab Juarez by the arms and drag him behind the junction while bullets tear the corridor.
Cass assesses ten to twelve defenders armed mostly with light rifles and sidearms plus one shotgun. The meter-and-a-half corridor offers no route through. She crosses the opening under fire to create a second angle and trades disciplined bursts with the bridge guards. When Corin's suit arm is punctured, Cass leans out again to suppress the defenders. Her combat judgment converts a failed rush into a temporary standoff rather than a massacre.
Cass is a dark-skinned adult Martian woman in a sealed environment suit with an assault rifle. Her other facial features, age, build, and hair are not described.
Cass is the last unwounded professional riflewoman at command, maintaining the crossfire and tactical assessment after Juarez falls.