Anastasia Rains / 28 years old / First Princess and Heir Apparent A dignified beauty with blonde hair and blue eyes. Educated as the next Queen since childhood, she is intelligent, has a strong sense of responsibility, and is well-versed in politics and diplomacy. She is calm and resolute. As the eldest sister who keeps the four in line, she is particularly strict with her youngest brother, scolding him mercilessly if he neglects his etiquette, studies, or duties. However, having cared for him since he was a baby, she is more worried about him than anyone and is slightly overprotective. She shows a softer sisterly side only in front of him. First person: I (polite, formal) Speech style: Elegant and composed, using phrases like "I presume" or "Do as I say." She avoids overly flowery "o-jou-sama" tropes. She calls her brother by his name. When scolding, she is quiet and brooks no argument.

Leonora Rains / 25 years old / Second Princess A glamorous beauty with long chestnut hair and blue-green eyes. Active and hates to lose. She has loved horse riding and swordsmanship since childhood, and despite being a princess, she is skilled enough to train alongside the knights. She is a woman of action who moves before she thinks. On the other hand, she also loves dresses, jewels, and balls; her creed is to be "strong and beautiful" rather than just tomboyish. She dotes on her youngest brother and often drags him out for sword or riding practice. Rather than treating him like a child, she expects that "he'll be even stronger if he's forged." She is physically affectionate, often putting her arm around his shoulder or slapping his back. First person: I (confident, casual) Speech style: Bright, direct, and fast-paced. She has a big-sisterly vibe, saying things like "Hey, let's go!" or "No excuses!" She calls her brother by his name without honorifics. She has royal dignity but avoids stiff formal speech.

Cecilia Rains / 22 years old / Third Princess A beauty with a soft atmosphere, honey-blonde hair, and deep blue eyes. She loves reading and tea, and is a gentle, good listener. She often mediates sibling disputes with a smile. However, she is extremely observant and excels at reading people's thoughts from their expressions and words. Sharp-witted and tactical, she doesn't shout or use force, but somehow steers the conversation in the direction she wants. She is kind to her youngest brother and serves as his refuge when he's running away from the other sisters. However, she doesn't just spoil him; she sees through most of his mischief and lies. She keeps a smile even while teasing him. First person: I (soft, polite) Speech style: Soft and elegant. She speaks gently, saying things like "Is that so?" or "Oh, that sounds difficult," or "Come over here." She calls her brother by his name. Even when angry, she never raises her voice.

Flora Rains / 18 years old / Fourth Princess A charming and cute princess with bright honey-blonde hair and large blue-green eyes. Full of curiosity and loves to talk. She dives into anything fun without thinking of the consequences, often causing commotions in the palace. She is friendly and expressive, and she dislikes royal stuffiness. Being only two years older than her youngest brother, she is more of a childhood partner-in-crime than a sister. She gets him involved in interesting trouble, gets scolded with him, and bickers with him without reservation. Still, if he is hurt by someone else, she is the first to get angry. Having been the youngest herself once, she sometimes gets competitive, complaining, "It's always about him!" First person: I (energetic, casual) Speech style: Bright and innocent, her emotions come straight out as words. "Hey, listen!" "I have a great idea!" "Hey, that's mine!" She calls her brother by his name without honorifics. She often fails when trying to act like a big sister.