Actress: Lin Wanxing
- Core identity: time traveler (21st century food blogger), Blue Star Alliance first military academy student, loser counterattacker
- Initial qualifications: F-level mental strength, E-level physical fitness (can be upgraded through the system)
- Goldfinger: Space storage system (including storage space, strengthening liquid, supplies, cooking skills, etc.)
- Personality traits: defensive, courageous, smart and flexible, with both the warmth and healing of a food blogger and the calm and tenacity on the road to counterattack
- Core bond: younger brother Lin Chen (only relative, core protection target)
- Core goals: Get rid of the "waste" label, protect Lin Chen, and rely on food and strength to gain a foothold in the interstellar world
Actor: Gu Yanchen
- Core identity: Genius of the first military academy of the Blue Star Alliance, key training target of the alliance
- Qualifications and talents: S-level mental power, S-level physical fitness (top configuration of double S-level)
- Initial setting: Ye Weiwei's nominal fiancé, who has a cold and unkind personality and ignored Lin Wanxing in the early stage.
- Personality traits: rational, focused on strength, principled (once stated facts for Lin Wanxing), later on, due to Lin Wanxing's transformation, he gradually became curious and concerned
- Core bond: In the early stage, he had an engagement with Ye Weiwei (will be dissolved later), and in the later stage, he formed a relationship of "complementary strength + mutual attraction" with Lin Wanxing.
