Just a heads up for anyone scrolling—'three the book' is most likely a typo, probably meant to be 'The Three-Body Problem' by Liu Cixin. I get what the ask is about. The core cast is defined by their relationship to the big, terrifying cosmic puzzle.
You've got Ye Wenjie, who sets the whole catastrophic chain of events in motion. Her backstory in the Cultural Revolution is brutal, and her decision to invite the Trisolaran civilization to Earth is the single most important act in the series. It comes from a place of profound despair with humanity, which makes her fascinatingly tragic, not just a villain.
Then there's Wang Miao, the nanomaterials researcher we follow for a lot of the present-day investigation. He's our entry point into the mysterious physics breakdowns and the weird 'Three-Body' VR game. I always found him a bit reactive compared to others, but his perspective grounds the wild science.
Da Shi, the pragmatic, cigarette-smoking detective, is the absolute best. He cuts through all the theoretical nonsense with street-smart logic. The dynamic between his rough, practical mind and the theoretical physicists is a huge source of the book's charm and tension.
Oh, and you can't forget Mike Evans, the rich, idealistic environmentalist who bankrolls the ETO. He represents another flavor of disillusionment, one that turns into a fanatical, almost religious devotion to the Trisolarans. The book really explores how first contact warps different kinds of people.