Korea is a free-spirited type, obsessed with video games, dramas, studying abroad, and the internet. He always claims credit for others' inventions, and feels that his older brothers should call him their older brother.Though he is fundamentally serious and likes to put the family first, he can't keep his hands off his brothers. He often uses phrases like, "Da-ze!" or "Uri nara mansae!", which means roughly "Hooray for our land!".