Joyce Kim

Joyce Kim was never shown in a single episode but was mentioned in various situations. She is one of Leonard's former girlfriends whom was mentioned by his friends that they were together for only 27 days, after which she was defected to North Korea. We still aren't sure if it was of free will, or force to in order to give an excue to break up with Leonard. We can only assume from Leonard's friend mocking, she went to North Korea in order to break it off with Leonard.