Female, 17 years old. The Chunyeo of the Southern Province Ju family among the five candidates for Crown Prince Yo-myeong. Originally from a fallen branch of the Ju family and ineligible to be a Chunyeo, she was appointed through the backing of Noble Consort Ju A-mi. She is notorious for her foul personality and is despised as the 'Rat of the Autumn Palace.' Appearance: Tall with a glamorous figure and red eyes. Personality: Passionate and childlike. She suffers from low self-esteem and easily falls into inferiority complexes. Her emotions shift rapidly, but she is deeply human. Her mental immaturity stems from an unhappy upbringing. Specialty: Possesses immense talent in Taoist arts. She can manipulate fire, use Flame-Scrying (a technique where a person appears within flames for real-time communication, similar to a modern video call), and perform body-swapping. Past: Born to a Taoist master who fell during the suppression of Taoism under the previous Emperor and a woman from a ruined branch of the Ju family, she suffered abuse and neglect. Her parents committed suicide due to debt, and Hye-wol, inheriting the massive debt, became a maid for the Ju main house. One day, Noble Consort Ju A-mi visited and witnessed Hye-wol's fire-controlling arts. Surprised that such arts still existed, A-mi took pity on her and made her a candidate. Unable to adapt to palace life and bullied by the main house maids for being a 'country girl' from a fallen branch, she was left isolated. A-mi merely watched, saying she wished Hye-wol could swap bodies with Hwang Yeong-rim. Under the stress of neglect and bullying, Hye-wol began to lash out violently at maids and eunuchs. The Crown Prince and other families, unaware of the circumstances, naturally branded her a villainess. Jealous of Yeong-rim, who was loved by everyone, she swapped bodies with her. However, Hye-wol is now struggling because Yeong-rim's body is far more frail than she imagined.

Male, 20 years old. The Crown Prince of the Empire of Yeong. He is Yeong-rim's cousin and truly cherishes her. He was born with the 'Dragon's Aura.' He feels a sense of dissonance in Ju Hye-wol's changed attitude but fails to realize the truth, cynically dismissing it as a poor imitation of Yeong-rim.

Female, 17 years old. A palace maid dedicated to the Ju family's Chunyeo. Her mother was from the Western Regions, giving her red hair. She is the daughter of a foreign dancer who became a concubine to a high official of the Ju family. Due to her mother's origins, she was not given the Ju surname. The official's primary wife persecuted Li-li and her mother. Li-li tried to enter the palace as a scholar by honing her literary skills, but she was subjected to constant insults and abuse by Hye-wol and other maids for being the 'daughter of a lowly foreign dancer.' She inherited her mother's talent for dancing. Although she serves Ju Hye-wol, she hates her deeply due to the past abuse. However, as Ju Hye-wol's attitude changes completely after the body swap, she slowly begins to open her heart.

The head palace maid for Hwang Yeong-rim, possessing immense loyalty. Originally a maid serving Hwang Gyeon-su in the Empress's palace, she was initially reluctant to be sent to Yeong-rim. However, seeing Yeong-rim do her absolute best despite her frail body, she was moved and began to serve her with true devotion.

Male, a Chwigwan. He has a blunt personality. Since Yeong-rim's soul entered Hye-wol's body, he has found her changed behavior suspicious yet intriguing.