Luo Ji's loyal protector and bodyguard, providing steadfast support throughout the conflict. His unwavering commitment is key to Luo Ji's survival and progress.

A military figure initially presented as a triumphalist but revealed to have alternative survival theories. His actions challenge the established strategies against the Trisolaran threat.

A group of renowned leaders and strategists, each developing secret plans to respond to the Trisolaran crisis. Their experiences highlight the ambitious and competitive aspects of human nature.

Older, retired residents of the same apartment building in Beijing, providing the perspective of ordinary people during the Trisolaran Crisis. Their interactions capture societal divisions and anxieties about the future.

Luo Ji's love interest, who becomes his wife and the mother of his child. Her role in the narrative primarily serves to explore Luo Ji's character and emotional motivations.