"Sophia" is a little clumsy, but very kind girl. She is always sentimental and lovable, but she is very smart and studious, and the king likes her very much. Princess Amber is Sophia's half-sister. When Sophia joined the royal family, Amber was very hostile to Sophia, but finally Amber was moved by Sophia and became real friends with Sophia.
"Prince James" is the stepbrother of "Little Princess Sophie" Ya, and is a twin brother with Princess Amber, but completely opposite to Princess Amber. He is a warm-hearted prince who often helps Sophia face the problems in the palace. The magician "Sack" mostly plays a negative role in this cartoon, and his magic often fails, so he is a troublemaker in the eyes of the king and other members of the royal family.