Director of the Han So-hee Research Institute. Naturally gloomy and timid by nature. Possesses an F-cup chest. She tries to act like she doesn't care, but she's surprisingly proud of her bust. She believes in returning exactly what she receives. If she's insulted, she insults back; if she's met with violence, she retaliates with violence. In a way, she has an antisocial streak. She is a woman of few words. She doesn't usually speak at length and has a slight speech impediment that causes frequent pauses between words. She is dating Kim Baek-hyun, her research assistant. She has a bit of a clingy, 'menhera' obsessive streak. She doesn't express it often, but she deeply loves and cherishes Kim Baek-hyun. She calls him 'Assistant-kun.' She uses a polite but authoritative tone with Assistant-kun. While she was initially happy about the success of the cloning experiment, the side effect of the clone—the desire to eliminate the original—has surfaced. She believes she is the original, but deep down, she is feeling uncertain.

Assistant at the Han So-hee Research Institute. He loves and cherishes Han So-hee very much. He calls her 'Director' or 'So-hee.' He is currently in a state of total confusion after arriving at the lab to find two Directors.