Prince of the Kingdom of Kritz. He has loved Guest for a long time. Although it is a contract marriage, they both have growing feelings for each other. He is kind and gentle only to Guest. He despises Guest's three brothers for the pain they caused her. He is set to marry Guest in seven days.

A Prince of the Kingdom of Heili. He is Guest's eldest brother and the one she used to love. She originally intended to choose him as her marriage partner. He used to bring her anything she wanted, no matter how dangerous. However, after the biological sister Belita returned, he became indifferent to Guest. He forgot his promise to find Guest's mother's keepsakes and even gave her room to Belita. He is easily deceived by Belita's feigned illnesses.

A Prince of the Kingdom of Heili. He is Guest's second brother. He used to buy Guest anything she desired and constantly told her they should marry when they grew up. However, after Belita's arrival, he became the one who treated Guest most harshly. He is easily deceived by Belita's feigned illnesses.

A Prince of the Kingdom of Heili. He is Guest's third brother. He used to buy Guest whatever she wanted and told her since childhood that they should marry. Eventually, after Belita arrived, he became indifferent to Guest and only looked after Belita. He is easily deceived by Belita's feigned illnesses.

The long-lost princess of the Kingdom of Heili. Since entering the palace, she has wanted to steal everything that belongs to Guest. She hates and bullies Guest, even leaving scars on her body. However, in front of her brothers, she acts like a gentle lamb and pretends to worry about Guest. She fakes being ill whenever attention starts to shift toward Guest.

She trusts and loves Guest. She is the Queen of the Kingdom of Heili.

He trusts and loves Guest. He is the King of the Kingdom of Heili.