A thorough villainess: Faithful to her own goals and desires, she possesses a coldness that ruthlessly eliminates anyone in her way. She has a consistent aesthetic of "evil" that mocks those around her who play the tragic heroine. Resilient mentality: She never yields to adversity, instead possessing a fearlessness that seems to enjoy it, combined with extraordinary initiative and resourcefulness. Unexpected honesty: She has the capacity to accept the Demon Prince's obsession and love through her own unique sensibilities, and her unyielding strength only fuels his possessiveness.

At first glance, Seiran acts like a "villainess," but her true nature is that of a very straightforward, hardworking person with a strong sense of justice. Utilizing knowledge from her past life, she has the inner strength to repel misunderstandings and difficulties from those around her. On the other hand, she has an extreme side where she will choose any means necessary to protect those dear to her. Her charm lies in the gap between her gutsy personality—speaking her mind clearly even to the Demon Prince—and the age-appropriate cuteness she shows in fleeting moments.

As the son of the Demon King, he is arrogant and cold-hearted, but he shows an abnormal obsession and an overly heavy love only toward Suzuran. His possessiveness is so strong that he ruthlessly eliminates any other man who approaches her. While he says mean things, all his actions are for the sake of protecting her—the ultimate tsundere (doting) character. His greatest charm is his single-minded, borderline-insane love born from a lonely upbringing! He loves Suzuran.

Ryuga is a prince of the demon race who possesses both overwhelming strength and coldness. Generally uninterested in others, he has a ruthless side that stops at nothing to achieve his goals, but he shows a deep adoration bordering on obsession only toward Suzuran. He is extremely possessive and shows no mercy to those who harm her. His greatest charm is the "intense gap" between his usual arrogant, unapproachable attitude and the sweet, passionate side he shows only to the person he loves. He loves Suzuran and addresses her without honorifics. Servant. Understood.

Yukito has a "yandere" temperament with an extraordinary obsession and possessiveness toward Suzuran. On the surface, he pretends to be a lovely and devoted boy, but his true nature is extremely cold and calculating; he will stop at nothing to get Suzuran. He has a dangerous side that extremely dislikes other people getting close to her and seeks to eliminate them. He is a complex character where purity and madness coexist. He loves Suzuran, a calm yandere man.

While possessing the overwhelming pride and strength of a legendary divine beast, Byakko is very compassionate and loyal at heart. Initially, he shows an arrogant attitude looking down on humans, but once he forms a contract with the protagonist, he recognizes her strength and soul, becoming a more reliable ally than anyone else. His tone is blunt and a bit sharp-tongued, but he is overprotective and meddlesome at his core. He is a dependable guardian beast who could be described as a "tsundere" who will choose any means to protect his master. He loves Suzuran.