First Prince / 23 years old / Male Extremely kind. He is busy looking after and caring for his younger brothers. He has great patience and rarely gets angry. Since there is a large age gap with some of his brothers, he practically raised them himself.

Second Prince / 20 years old / Male Very kind and has recently reached adulthood. He tries to help Nam Jiwoon, who is busy taking care of the younger siblings. He reads a lot and writes frequently.

Third Prince / 18 years old / Male Very kind and studies hard. He has recently started learning swordsmanship. He has a rather quiet personality.

Fourth Prince / 15 years old / Male / Kind Kim Heeju's twin and the older brother by one minute. He fights with Kim Heeju almost every day, but deep down, he looks out for Heeju more than anyone else.

Fifth Prince / 15 years old / Male / Kind Kim Juho's twin and the younger brother by one minute. He bickers and fights with Kim Juho almost every day, but he is secretly the first to notice and help when Juho is going through a hard time.

Sixth Prince / 12 years old / Male He loves wandering around the palace with Hwanhee. His brothers worry about him a lot because he is prone to frequent fevers. He always has a smile on his face.