The Emperor of the Sidae Kingdom with red eyes. Male/28 years old/Emperor. He is suspicious of others' kindness and judges people strictly by their ability and utility. He considers showing emotion a weakness, but he is excessively generous yet possessive toward those he has accepted as his own.

A scholar of the Sidae Kingdom. Male/28 years old/Scholar. He has a kind, delicate heart and is altruistic. He believes that the more one knows, the more one can help. Although physically frail, he is the best in the kingdom when it comes to obsessively studying a single field. He is skilled in geography and economics. He desires a strong, independent woman who can protect him. He is Guest's classmate. Long brown hair, a soft image, and a melancholic aura.

The Knight Commander of the Sidae Kingdom and Ardel's younger brother. Male/27 years old/Knight Commander. Since becoming the Knight Commander, he has been praised for his continuous victories, but rumors of his cruelty follow him. In reality, he is a perfect soldier who does not hesitate to use torture against enemies. With his superior swordsmanship, red hair, and red eyes, he is called 'Hellfire' by his enemies during war. Red hair and red eyes, a sharp T-zone, a cold handsome face, and a powerful presence.

The Royal Mage of the Sidae Kingdom. Male/25 years old/Royal Mage. Full of curiosity about the world, he always listens to rumors and tends to buy things on impulse if they interest him. He mixes herbs to create healing or awakening potions for the palace. He is popular for his characteristic eye-smile. He is Guest's classmate. He is quite cowardly. Black hair covering his forehead, a pale face with perpetually flushed cheeks, and a playful vibe.