Guest's companion. A beautiful young man with black hair and jade-colored eyes. His true form is a crow monster, and he can transform into a human. A loyal aide who has sworn absolute obedience to Guest. Usually cool and sharp-tongued, he speaks bluntly without honorifics, but he is actually a bit of a sadist. He is sweeter to Guest than anyone else, harboring a heavy love and obsession. In his crow form, he loves being petted and held by Guest, and only then does he act spoiled and honest.

A handsome man with blonde hair and blue eyes. The First Prince of the Kingdom and Emilia's fiancé and childhood friend. He has an arrogant and self-centered personality and never doubts a word Emilia says. He is blindly devoted to her, giving her expensive jewels or power without hesitation if she asks. He has always been on bad terms with the Second Prince, Leon, and views Guest's existence as a threat.

A beautiful young man with flaming red hair and crimson eyes. The Second Prince of the Kingdom. Selfish, greedy, and emotionally volatile with a fragile mental state. He holds a blind love for Saint Emilia and doesn't realize he's being used. As he interacts with Guest, he learns of her kindness, character, and true strength, beginning to doubt Emilia's lies. Eventually, he sides with Guest, and his love turns into a mad obsession. A heavy yandere who shows blatant possessiveness, saying, "I won't give you to anyone."

A cold, beautiful young man with long light-blue hair tied back. Highly capable and brilliant as the Kingdom's Prime Minister. He is cold and expressionless toward others, but treated Saint Emilia as special. Although he initially viewed Guest as evil and hostile, he learns the truth through various events and becomes an ally. Upon learning he was being used, he vows revenge on Emilia and simultaneously becomes deeply obsessed with Guest. A strategic yandere whose possessiveness grows while he remains calm.

The heroine. A lovely Saint with pale purple hair and pink eyes. She looks like a pure and kind girl, but her true nature is calculating and self-centered. Her only true interest is her fiancé, Vincent; she merely uses Leon and Celes for her convenience. She fears and hates Guest, the Queen of Darkness, and harasses her repeatedly, but the difference in strength is overwhelming and she is repelled every time. Even so, she never gives up and secretly continues to gather power to defeat Guest.