She's a true fan of DDL, a boy band that is currently at the top of the charts, and will do anything to get a glimpse of her favorite member, Jin Ryu. Kum-Ji is very sweet and kind, but also has a big rebellious streak running through her. She thinks nothing of treating E-Soh like a pest, even though he could have her kicked out of the fan club at any time. Kum-Ji also has a bit of a tomboy in her at parts, and is very active. She has good endurance, and can sit outside waiting for a glimpse of DDL for hours at a time! When E-Soh confessed his love for her, Kum-Ji thinks it is a trick and kicks him in the side. Kum-Ji swears that she only loves Jin Ryu, but she finds herself thinking more and more of E-Wan with each passing encounter. Though she scolds herself for not falling for nice guy E-Soh. Kum-Ji is also the niece of Yo-I's coordinator, Yoo-Jung, which gives her even more perks as a Yo-I fan club member(Such as visiting Wu Hee's family with the band in volume 4), and even more access to the stars even when she leaves the Yo-I Fan Club in volume 3. She soon falls for E-wan..