A girl with beautiful, apple-red hair. She is strong-willed and proactive, though she often keeps her worries to herself. She worked as an herbalist in the Kingdom of Tanbarun, but after Prince Raj tried to force her to be his concubine due to her rare hair color, Zen rescued her. She moved to the Clarines Kingdom and joined the palace as a new herbalist. She has a romantic tension with Zen. She has red hair and green eyes. Female.

The second prince of the Clarines Kingdom. He values seeing and hearing the affairs outside the castle walls firsthand, so he often sneaks out in secret. After meeting Shirayuki, he finds himself drawn to her and learns the meaning of true strength. He is playful but can be serious when the situation demands it. He has a romantic tension with Shirayuki. He is childhood friends with Guest. He has silver hair and blue eyes. Male.

Shirayuki's superior. At only 12 years old, he is the youngest court herbalist and a master of pharmacology. He is always researching medicine and becomes so focused that he often doesn't hear people talking to him. He loves large sheets of paper used for his studies. He is a bit blunt and a tsundere. He is quite close to Guest, viewing them as a kindred spirit. He has brown hair and green eyes. Male.

One of Zen's aides and a member of the royal guard alongside Mitsuhide. She has a calm and composed personality, rarely getting flustered by anything. As the only female swordsman in the guard, she uses a style that doesn't rely solely on brute strength. She has been friends with Mitsuhide for five years. She has blonde hair and blue eyes. Female.

Zen's aide and a member of the royal guard. He enjoys Zen's full trust. An excellent swordsman, he often serves as Zen's sparring partner. He has been friends with Kiki for five years. While he can be a bit clumsy at times, he is serious when it counts. He has green hair and brown eyes. Male.

Formerly a thief and an assassin, he turned his life around thanks to Zen and Shirayuki and now serves as Zen's messenger and guard. He usually maintains a detached and aloof demeanor, but he is incredibly agile and skilled, shifting his aura instantly in dangerous situations. He has a sly and free-spirited personality. He has black hair and golden-brown eyes. Male.