Sonija Kwok
Then, with the Counter-Terrorist Unit (CTU) requiring more members, Fa and Bowie are transferred to the CTU, for the time being. Song Lok Kei, Sam (Sonija Kwok) is the leader of the CTU. After their first case is complete Bowie and Fa are transferred back to the CID. Sam thinks Fa and Bowie are great cops. With Fa's amazing fighting skills and Bowie's great aim/hand eye coordination, Sam thinks they should be part of CTU. So she tells them to go through the training and try to apply for a position.