May督察

A police detective in the Yau Ma Tei Police Department and Joe's supervisor.
She was in the same class with Leung and Lai at the police academy and was the highest achiever among them.
However, one day her brother was killed by Roy in an accidental shooting.
She cannot tolerate Roy's continued involvement with the police as an undercover police officer, so she tipped off the Over Heaven society anonymously.
But as a result, Detective Wan was killed in defense of Roy, and she sincerely regrets what she did.
With a sense of atonement, she cooperates with Leung in his efforts to correct the corruption in the Hong Kong police force.
She is a member of Leung's information concealment investigation team.
She visits Yvet for questioning after being tipped off.