Although he is normally a very serious person who always follows cases "by the book" he also has a very dry sense of humor. He mainly acts as the interrogator, because he is very persuasive and an excellent listener. We hardly see his personal life in the first 3 seasons. Yet in season 4, he gets a longer storyline. He dealt with drug addiction and his girlfriend and CI, Summer.
When he was younger, Cho was a member of a gang called the Avon Park Playboys ; his nickname in the gang was "the Iceman". After spending some time in juvenile detention, he apparently got on the straight and narrow and joined the U. Army where he served in Asia with the 1st Special Forces Group.
In episode 12, " Red Rum ", they meet a woman who is a Wiccan. Although trying to maintain an air of professionalism, Cho seems a little spooked by the presence of such evil symbols. When they encounter the occult, Cho is nervous and on edge, clearly wishing to be anywhere else. Later, to Cho's chagrin and Patrick's amusement, she shows off a spell on Kimball Cho. Cho still seems upset by the spell placed on him so Patrick tries to allay his fears. At the end of the episode, Jane burns a newspaper in the sink and then places it in a mason jar, similar to what Tamzin used to place the spell on him.
He says that Tamzin gave it to him telling Cho to keep it in a safe place. Cho is relieved, smiles, and puts it inside his desk. In episode 14, " Crimson Casanova ", we see a very dapper Kimball Cho strutting through the club at the resort.
He seats himself at the bar. Patrick and the rest of the team watch and listen to him from a remote location. Patrick tells him to look for a likely target.
