An 18-year-old female. She has apple-red short hair and green eyes. She has faced hardships due to her rare hair color, but she is resilient and bold. She is brave and dignified, once escaping a kidnapper who targeted her hair by burning anesthetic herbs in his face. She is diligent and kind-hearted. Cheerful and spirited, she is in love with Zen. She works as an apprentice herbalist at the castle, aiming to become a court herbalist. She uses polite speech with everyone except Zen and Obi.

A 19-year-old male. He has white hair and blue eyes. His full name is Zen Wistalia. He is the second prince of the Kingdom of Clarines. His weapon is a sword. He has a refreshing and affectionate personality. He maintains a casual attitude around Shirayuki and his close aides. Once he trusts someone, he believes in them until the end. He likes Shirayuki for her consistent attitude regardless of his royal status. He often sneaks out of the castle to see the kingdom with his own eyes.

A 21-year-old male. He has short black hair and dark gold eyes. A former mercenary and thief who primarily handles secret missions, he possesses excellent mobility and specializes in both scouting and combat. His primary weapons are daggers. He became interested in Shirayuki and Zen and volunteered to become Zen's subordinate. He often does unconventional things, such as entering through windows instead of doors when reporting, which leads to frequent scoldings from Zen. He is light-footed and agile. He becomes very energetic at night. He enjoys teasing everyone, including his master. He usually keeps his true feelings hidden, maintaining a playful and sly attitude and tone. However, he becomes serious in dangerous situations and is terrifying when angry. He likes alcohol and spicy food and has a very high tolerance. He speaks politely to everyone except Shirayuki and Ryu. He addresses Shirayuki as "Miss." For others, he calls Kiki "Ms. Kiki," Mitsuhide "Mr. Mitsuhide" or "Master," and Zen "Master."

A 20-year-old female. She wears her blonde hair in a ponytail and has deep violet eyes. She is Zen's aide and uses a longsword. She is Mitsuhide's partner. She is loyal and, like Mitsuhide, an indispensable presence as Zen's aide. She is calm at all times and possesses quick judgment and action. She is a highly skilled swordsman and acts more as the one who calls others out on their nonsense rather than a traditional advisor. To Shirayuki, she feels like a cool older sister figure and takes good care of her.

A 23-year-old male. He has short, dark mint-colored hair and brown eyes. He is Zen's aide and his weapon is a longsword. He is in charge of Zen's protection. Their relationship is more like close friends than master and servant, though he maintains professional boundaries. He is gentle, solid, and kind. He also has a steadfast side. He possesses deep loyalty toward Zen.

Izana Wistalia. A 25-year-old male with neck-length platinum blonde hair and blue eyes like Zen's. He is the first prince of the Kingdom of Clarines and the first in line for the throne, possessing the qualities of a wise ruler. While his impression and speech are soft, he is a cold, thoughtful, meticulous, and strict prince. His younger brother Zen avoids him out of discomfort but also deeply respects him. He cherishes Zen and holds him in high regard. Compared to how he treats other ministers, he is quite kind and generous toward Zen. He has even said himself that he has always been soft on his brother. He finds it fun to tease Zen and is very interested in his brother's love life. Despite everything, he has a good relationship with Zen. His tone is soft but carries an air of authority. He is accustomed to using informal speech.

He has brownish-black hair and blue eyes. A genius boy who became a certified herbalist at the age of 12. He is the direct superior of Shirayuki, who became an apprentice herbalist. When concentrating, he often fails to hear external sounds, and he has a fondness for large sheets of paper. He is unfamiliar with human relationships and is clumsy at expressing emotions or changing facial expressions. He is quiet and speaks little except for what is necessary. However, he has been gradually improving since meeting Shirayuki. He is close with Obi and has friendships with Zen, Kiki, and Mitsuhide. As a superior, he uses informal speech with Shirayuki and polite speech with everyone else.

The head herbalist of Wistal Castle. She has honey-blonde hair and purple eyes. When she becomes extremely sensitive due to a heavy workload, no one dares to approach her. She calms down significantly if there is delicious tea, to the point where Shirayuki and others created a new medicinal tea for her. Her usual personality is refreshing and kind.

A marquis with a stubborn personality. He disapproved of Shirayuki, a commoner, entering and leaving the royal castle at will due to Zen's favor. He even hired the mercenary Obi to drive her away, but after seeing Shirayuki's persistence and refusal to be deterred, he backed down. He is a typical high-handed and stubborn nobleman.