It's Rin.

Ren explains to Mei: "Sora isn't lying. He's telling the truth as he reconstructed it. He has a condition – confabulation due to a minor temporal lobe lesion from a past head injury. He genuinely believes he was in the car. But watch his hands when he describes leaving the club."

A disgraced, cynical cognitive scientist who can read micro-expressions is forced to team up with a brilliant but emotionally erratic rookie detective who cannot tell a lie. Together, they must solve the "Perfect Alibi Murders," where every suspect is clinically telling the truth.

Ren closes his file. "Case closed. Next?"

Rin, the hostess who showed contempt, who dissociated during the livestream. She wasn't a witness. She was the puppeteer . She manipulated Sora (her secret lover) into committing the act while she provided the perfect alibi – using his neurological glitch as the perfect weapon.