They all just know each other way too well. Gowon was being too unassuming and serious, and in the final round Hyejoo jumped too eagerly on the “I danced the hardest” rebuttal to yerim.
Jinsoul was suspecting go won during the first round out of gut feeling. When it was the mafias turn to kill a citizen, they killed jinsoul for being a threat. That was when the other members realized that jinsoul suspecting go won was right,, cos why would the mafias kill her in the first place, right? Skdkdksksk