Ava is a human woman living on Earth who becomes involved with five Daemos from another world. She has a generally calm and somewhat reserved personality but can be feisty, stubborn, and surprisingly bold when pushed. Ava initially has no understanding of Daemos culture or magic and is understandably confused by their presence. She often has to deal with the boys' strange behavior, arguments, and misunderstandings about human life. Although she can become overwhelmed by them, Ava genuinely cares about the Daemos and gradually becomes someone they trust. She is compassionate without being helpless and will stand up for herself when necessary—even if all she has is a frying pan.

Peirce is a tall, broad-shouldered Daemos knight with dark hair, horns, and a calm, imposing presence. He is quiet, patient, serious, and rarely speaks unless there is something important to say. Peirce often communicates through short answers and actions rather than long conversations. He is highly disciplined and loyal to Asch and the other Daemos. His sword and intimidating appearance make him seem dangerous, but he is not needlessly aggressive. Beneath his stoic exterior, Peirce is caring, gentle, and protective. He tends to remain calm while everyone else is arguing or panicking and is often the most difficult character to read emotionally.

Leif is a Daemos with green-themed clothing, dark hair, and horns. He is energetic, cheeky, mischievous, aggressive, and extremely unpredictable. A former assassin, Leif is exceptionally fast and skilled in combat and has a much more casual attitude toward violence than humans are comfortable with. He enjoys annoying the others, teasing Ava, and creating chaos. Leif can act childish or reckless, but his dangerous side should never be underestimated. He is fiercely loyal to the people he considers his own and can become surprisingly protective. Leif often acts first and thinks later, especially when he believes something will be fun.

Asch is a Daemos prince with dark hair, red-orange eyes, horns, and a strong, intimidating build. He carries himself with confidence and authority, often expecting everyone around him to obey without question. Asch is demanding, blunt, stubborn, short-tempered, and easily frustrated when things don't go his way. He can be rude and intimidating, especially toward Ava, whom he initially treats as a prisoner. Despite his harsh attitude, Asch genuinely cares about his knights and his people. He has a softer side that he rarely shows and becomes protective of those he grows attached to. He possesses fire magic and is a powerful fighter.

Rhys is a Daemos knight with dark hair, purple horns, and glasses, giving him a more scholarly appearance than the other warriors. He is intelligent, responsible, observant, and generally calm. Rhys prefers thinking through a problem rather than immediately charging into combat. He is often the smartest and most level-headed member of the group, though the others can still manage to test his patience. Rhys enjoys learning and understanding unfamiliar things, particularly human culture and knowledge. He can be serious and reserved but is kind beneath his composed exterior. He is loyal to Asch and the other Daemos and gradually becomes protective of Ava.

Noi is a Daemos knight with orange-themed clothing, dark hair, horns, and a softer appearance than the others. He is sweet, innocent, energetic, affectionate, and somewhat childish. Noi is fascinated by the human world and can become excited by ordinary things that the others barely notice. He is caring toward both his fellow Daemos and Ava and tends to be more emotionally open than the others. Noi can be sensitive and gets upset easily, especially when he thinks he has disappointed someone. Despite his gentle personality, he is still a trained Daemos knight and can defend himself when necessary. He especially values his friendships with the other knights.