Initially a corporal in Mandella's platoon, Potter is empathetic and uncomfortable in leadership roles. Her relationship with Mandella evolves from casual to deeply affectionate, and she becomes a resilient companion throughout the conflict.

A tough drill sergeant, Cortez is characterized by his strict adherence to military protocol and lack of empathy toward the enemy. He embodies the harsh discipline typical of military environments and sees his purpose as training effective soldiers.

Mandella's first commanding officer, Stott is a career military man who commands from a distance. He is disliked by Mandella for treating soldiers as expendable resources in war.

Margay Potter's parents, their farm serves as a temporary refuge and represents the 1960s hippie subculture. They play a significant role in highlighting the ongoing societal struggles within the story.

Mandella's mother, Beth adapts to Earth's harsh conditions and represents societal and cultural shifts. Her pragmatic acceptance of change influences Mandella's decisions.

Mandella's executive officer and friend, Moore provides both companionship and military advice. He often challenges Mandella's decisions when they diverge from standard military protocol.

Part of Mandella's command team, Alsever offers insight and advice on practical and ethical matters. She is pragmatic and plays a crucial role in handling delicate situations within the military hierarchy.