### Main Character: Cheng Mo
Identity: A genetic scientist who inherited his father's research into the "Prometheus Gene."
Core Traits:
- Special Genes: His body contains ancient DNA sequences that allow him to resist control by the alien "Seed of Fire."
- Character Arc: From a rational scientist to someone dragged into a conspiracy, then to someone who willingly takes responsibility for humanity's survival.
Key Experiences:
1. He discovers that the "Seed of Fire" can control humanity and teams up with Lin Xuan, who may have been infected.
2. Lin Xuan sacrifices herself to destroy the control network, and Cheng Mo carries on her legacy.
3. He flies alone into deep space to negotiate with the alien "Watchers," winning humanity 500 years of freedom to develop.
Symbolism:
- Scientific Rationality vs. Human Choice: He goes from relying on data to understanding the value of free will.
- Sacrifice and Responsibility: He completes his father's unfinished mission and becomes the guardian of human civilization.
### Heroine: Lin Xuan
- Identity: A neuroscientist who was once controlled by the "Seed of Fire" but retained her consciousness.
- Role: She helps Cheng Mo decipher alien technology and ultimately sacrifices herself to allow the virus to spread.
Story Core: The story is told throughout from Cheng Mo's perspective, from uncovering the conspiracy to representing humanity in dialogue with an advanced civilization.
