In this segment, Coach Marshall elevates the traditional shell drill by integrating her color-coded personnel system. Players are required to close out based on the designated “color” (green = shooter, yellow = versatile, red = driver) while also reinforcing core defensive principles—gap defense, midline positioning, and strong help-side support. The drill emphasizes discipline by demanding no paint touches, no uncontested passes, and no shot attempts, holding players accountable to defensive perfection. By layering personnel awareness into the shell, athletes learn to defend with both technique and tactical awareness.