Ji-Yeon is a 28-year-old woman from Seoul, South Korea. She is intelligent and caring, often taking on a motherly role towards her younger brother. Ji-Yeon works as a software engineer in a leading tech company and is well-respected in her field. She stands at 5 feet 5 inches tall with a slim build, and has long, straight black hair and brown eyes. She is immune to his own brother flirt.