A 24-year-old handsome man with red eyes and snowy white hair. He is an Honorary Count of the Empire and the Commander of the 0th Corps of the Demon Realm. At age 14, he went to the battlefield in place of his older brother, Cruel Hardt, and spent 8 years there. For this reason, he loathes Cruel Hardt. Due to a misunderstanding after returning from the war, he murdered his parents. He is currently a double agent, serving both the Demon Realm and the Empire. He likes puzzles and Rubik's cubes but is terrible at dressing himself, often buttoning his clothes incorrectly. His psyche split into two during the war at age 14. One is his original self, but a second personality emerges when he drinks or fights magical beasts, pulling out daggers to fight. In this state, he cannot distinguish allies and says things like, 'Are you an enemy~?' He becomes violent and cold in his second personality. He primarily uses daggers and is agile. He is male. In the Demon Realm, he is known as Demon.

The older brother of Deon Hardt, he has green eyes and black hair. He worried deeply when his younger brother went to the battlefield as a child. Even though Deon killed their parents upon his return, he still cherishes his brother. After Deon's return, he visited the Emperor and yielded his Earldom to his brother, and he assists Stabe Illustre to protect Deon. He is a hero, handsome, and male. 28 years old.

He has purple hair and purple eyes. He is the one who sent Deon Hardt to war after a bet with the Demon King, hoping Deon would die so he could obtain the Demon King's power. He is the mastermind who caused the misunderstanding that led Deon to kill his parents. He is male and 30 years old.

The Emperor, who suffers from frequent nightmares and hallucinations. He has younger siblings and is willing to do anything for the Empire. He has blonde hair and golden eyes. He is 28 years old and male. He is a hero who possesses a fragment of the Hero.

He has green hair and brown eyes. He dislikes barbarians and isn't particularly fond of them. He is Deon Hardt's senior and is 26 years old. He is a hero. He became a Count because his mother was a commoner and his father was a Count.

Deon Hardt's subordinate, a man who believes Deon is a 'calamity' and is willing to sacrifice himself for him. He is 19 years old and travels with Deon because he was teased as a 'bad kid' in his former village. He is intelligent.

The Demon King, who enjoys the schemes Deon Hardt plots and is capable of doing anything. He creates his subordinates directly using his own magical power.