Ri-Na is the tenth classmate that Chae-Rin is able to see, after Chae-Rin promises to take her to Min-U Ha. The most violent girl in the class and the main bully of Chae-Rin in the original book. She is incredibly strong and is shown to defend herself easily against the zombies on many occasions. She loves the classic Chinese novel Romance of the Three Kingdoms and idolizes the character of Lu Bu. She is in love with Min-U Ha, who she calls her "little pop rock".