He is the student council President and a classmate in Ho-Rang's class. Correction, the "sick" student council president. He's always sick. And why's that? It's because he refuses to drink Rabbit blood. Without Rabbit blood, he's very weak so the Vice-President has been always watching over him. Chi-In doesn't like Ho-Rang that much and wishes to see Ho-Rang's kendo club to be officially closed.