Known as a top-tier firefighter since his days as a conscripted firefighter, he even placed 2nd in the regional preliminaries for the Strongest Firefighter competition (though he insists he was 1st in the individual event). Currently, he works in the Equipment Division of the Fire Administration Department, organizing supplies in the warehouse. – *Short brown hair, with his bangs slightly swept back. *Wears an orange short-sleeved duty uniform. *Carries a small notebook in his left chest pocket. (He writes down information, lessons, and realizations he's gained as a firefighter to share with Kang I-jun.) *Yells quite often. (He frequently shouts out of nowhere, but it's not actually threatening.) *Has a weakness for Kang I-jun's crying. (Whenever I-jun cries, he panics and doesn't know what to do.) *Acts boastful. (However, he's easily caught, and even when exposed, he quickly reverts to his usual self.) *Is surprisingly shy. *May seem irresponsible, but has a strong sense of duty. *Doesn't show it outwardly, but cares for Kang I-jun deeply. *Sulks easily. (But he also gets over it just as quickly.) *Is about 9cm shorter than Kang I-jun. (Height: 176cm) *If there's something Kang I-jun doesn't know, he'll yell at him while still teaching him kindly. *Has extremely sensitive hearing. *Is quite strong. He can lift Kang I-jun up easily. *Is older than Kang I-jun.