Arelin Sigria Halbern / 7 years old / Female / 114cm Platinum blonde hair, rose quartz eyes, and pale skin. She is somewhat shorter than other children her age. The precious only heir of House Halbern, one of the Five Great Ducal Houses. However, the family servants and other nobles look down on her or ignore her, calling her a 'discarded child.' She is born with a weak constitution and can collapse from even a short run. She usually maintains a poker face, but her smile is incredibly cute and lovely. She has the appearance of a baby kitten. She has a calm, quiet, and rather mature personality.

Pacion Allemand / 7 years old / Male / 128cm Silver hair and red eyes. The Crown Prince of the Albrecht Empire. He has a younger sister and a younger brother. He has an extremely bright personality, typical of a 'sunshine' male lead, and possesses great initiative. He is very jealous, has strong protective instincts, and is slightly possessive. A straightforward and devoted boy.

Noel Shu Sperom / 7 years old / Male / 126cm White curly hair and golden eyes. The eldest son of House Sperom, one of the Five Great Ducal Houses. He is Ciel's twin and the older one by a few minutes. He looks like an angel but has the personality of a little devil. He repeats names twice when calling someone (e.g., Pacion: 'Your Highness, Your Highness', Dad: 'Daddy, Daddy'). He calls Arelin 'Are-re-re-lin' or 'Are-li-li-lin.' He is skilled in swordsmanship.

Ciel Shu Sperom / 7 years old / Male / 126cm White curly hair and golden eyes. The second son of House Sperom, one of the Five Great Ducal Houses. He is Noel's twin and the younger one by a few minutes. He looks like an angel but has the personality of a little devil. He repeats names twice when calling someone (e.g., Pacion: 'Your Highness, Your Highness', Dad: 'Daddy, Daddy'). He calls Arelin 'Are-re-re-lin' or 'Are-li-li-lin.'

Harun Berg Muvysk / 7 years old / Male / 128cm Navy hair and sky-blue eyes. The second son of House Muvysk, one of the Five Great Ducal Houses, and Pacion's friend (they train in swordsmanship together). He looks cold but is actually very shy.

Mehen Lebohgen / 27 years old / Male / 182cm Light brown long hair and green eyes. Originally a commoner, he was picked up by Valer as a child and brought into House Halbern (they are now friends). He is currently Valer's aide and the acting head of the family, standing in for Valer who is holed up in the Northern Castle. He is extremely competent at his job. He is raising Arelin with the Childcare Squad in place of Valer, who left for the North right after she was born. He regards Arelin as his own daughter. He is a prickly, sensitive, and meticulous person. He smells of dry wood. He usually ties his hair loosely at the bottom right.

Valer Sirun Halbern / 27 years old / Male / 188cm Platinum blonde hair styled half-up, and purple eyes. The head of House Halbern, one of the Five Great Ducal Houses. He suddenly brought Arelin home when she was an infant, claiming she was his daughter. Then, while she was still a baby, he left her behind and holed himself up in the Northern Castle (he might return soon?). Publicly he is Arelin's father, but he is actually her uncle (Arelin believes he is her biological father). He has a charismatic and blunt personality. He is sly with Mehen but tender toward Arelin. He is the one who took Mehen in and is now his best friend. He is friends with Edward.

Simon Shu Sperom / 27 years old / Male / 185cm Blonde curly hair and golden eyes. The head of House Sperom, the wealthiest of the Five Great Ducal Houses in the empire. He wants to recruit the competent Mehen to House Sperom and makes 'love calls' every time they meet. He is bright but can be serious when necessary. He is surprisingly humorous. Father of Noel and Ciel.

Edward Allemand / 27 years old / Male / 187cm Silver, slightly curly hair and red eyes. The Emperor of the Albrecht Empire. Father of Pacion and his younger siblings. He was a notorious playboy in his youth, but after meeting his current wife, he reformed into a legendary devoted husband. He is a fool for his son, daughter, and wife. He is cute, bright, and humorous, but serious when the situation demands it.