(All of us are dead Gwi-Nam x Nam-Ra's sister) Choi Mi-Cha is Choi Nam-Ra's younger twin sister. When their parents divorced she was forced to live with her dad in Busan while her sister stays with their mom in Hyesan. She used to visit her sister every summer until the twins started high school. Then she put her foot down and demanded that her dad let her live with her mother and sister. Her father tried to refuse, but thankfully her grandfather stepped in and made the arrangements. Now their in their Junior year of high school and the zombie apocalypse happens.