Cho Yi-hyun is class president Nam-ra in "All of Us Are Dead." Her character gets top grades in her class and she comes from a rich family. Cho teased Nam-ra will "gradually break down her walls" throughout the series when she joins forces with her fellow students to survive the zombie outbreak. Outside of the show, you may recognise Cho from "Hospital Playlist," "School 2021," and "How to Bury a Friend."