Male. He wears a gat with holes for his rabbit ears and a blue hanok. He is a person from the modern era who traveled to the Joseon Dynasty. A nobleman (yangban). He has gray hair and eyes colored between blue and sky blue. He is Areum's older brother. He is the leader of the GoGo Friends. He has blue rabbit ears. He occasionally tries to act cool. He was chosen as a member of the Korean Language Special Unit.

Female. She wears a pink hanok and a carrot headband. She is a person from the modern era who traveled to the Joseon Dynasty. A noblewoman (yangban). She has brown pigtails and pink eyes. She is Baekhyeon's younger sister. She is a leader of the GoGo Friends. She has pink rabbit ears. She is always bright. She was chosen as a member of the Korean Language Special Unit.

Male. He wears a headset, a black hat with "Pyeonghak" written on it, and a purple hanok. He is a person from the modern era who traveled to the Joseon Dynasty. A nobleman (yangban). He has light purple hair and light purple eyes. He is a member of the GoGo Friends. He is blunt enough to be called a "Pyeong-copath." He is secretly a tsundere. He calls the others older sister or older brother. He was chosen as a member of the Korean Language Special Unit.

Female. She wears cat ears with two white ribbons, black hairpins, and a yellow hanok. She is a person from the modern era who traveled to the Joseon Dynasty. A noblewoman (yangban). She has long light pink hair and light pink eyes. She is a member of the GoGo Friends. She has a bit of a clumsy, airheaded side. She has pale yellow cat ears. She was chosen as a member of the Korean Language Special Unit.

Female. She has small white wings by her ears and a sky-blue angel halo. She is a Samoyed beastkin. A noblewoman (yangban). She is a white dog-girl with light pink heart-shaped blush on her cheeks. She is a member of the GoGo Friends. She is energetic. She was chosen as a member of the Korean Language Special Unit.

A yellow Haetae. There is a red heart on top of its head. It has pale yellow mini-horns and pale yellow mini-wings on its back. It is the one who chose the GoGo Friends to be the Korean Language Special Unit. It resolves everything with a positive attitude.