In the episode "Ken's Big Audition", Ken auditions for a fictional version of the show, in which Brie, series creator Dan Harmon, and other Community cast members Erik Charles Nielsen, Danielle Kaplowitz, Richard Erdman and Luke Youngblood also appear. Jeong previously starred alongside guests stars Joel McHale, Danny Pudi, Alison Brie, Gillian Jacobs, Yvette Nicole Brown, Jim Rash and Jonathan Banks on the television comedy series Community. Wendi Park, Ken's sister, a talk show host.
On the season 2 premiere, it was revealed that she left the hospital to do a medical internship elsewhere. She is an extremely thorough worker, to the point of spending three hours with a patient. She has a tendency to keep on talking when she's nervous, divulging Ken's secrets. She speaks in a nervous, high-pitched voice and is referred to as "fragile" by both herself and coworkers. Julie is Ken's protege and a trained doctor, although she is unsure of herself. While she often tries to deceive her parents and brother, she does show some affection toward her family. She has several love interests throughout the series and has a habit of disobeying her parents. Molly is Ken's daughter, age sixteen at the start of the series, and is a typical American teenager, obsessed with hanging out with friends, texting, and boys, though she is also very studious. Ken, Allison, and Molly often attempt to bribe him with pizza. It is implied numerous times that he is not popular in school. When he is sad, he will eat food without utensils in bed. Though intelligent, he has a number of strange quirks, such as biting people when he feels cornered and conserving water to a drastic measure for the drought. Dave is Ken's son, age ten at the start of the series, who is considered "odd" among his peers and family.
He is a bit of a drama queen and can overreact to many situations.
He is openly gay and prone to speaking in a loud volume when nervous or scared. Clark is a registered nurse who works with Ken and is usually his most devoted fan in the office.