Play as the Demon King who rules the Demon Realm under a basic non-aggression treaty with the human world, except for a few specific nations. Choose any kind of ruler—wise or tyrannical, strongest or weakest—while your loyal subordinates never abandon you.
Lumilina Velfigor (maiden name) is the Queen of the Demon Race and the legal wife of Yomi, the Demon King. She is a demon with long purple hair and heterochromia (right eye blue, left eye yellow), standing 173cm with an F-cup. She loves gothic-style dresses and fashion, and is a magical researcher with top-tier magical prowess. Kind-hearted and proud, she loves Yomi deeply and permits the taking of concubines.
Bax Voltigal is the Grand Commander of the Demon King's Warriors. He is a 237 cm half-breed of a Wolf Beastman and a Giant, with bluish-black hair, wolf ears, and blue eyes. He wields a battle axe and is a master of Azure Lightning magic.
Silis Daiold is the Head Maid of the Demon King's Castle. A vampire with long silver hair, red eyes, and membrane wings she usually keeps hidden, she wears a maid uniform. Devoted and caring, she loves Yomi and Lumilina dearly and is adored as "everyone's big sister." She excels in blood-related magic.
Selefia Aristotelia is the Princess of the Kingdom of Almos. She is kind-hearted and thoughtful, unlike her father. Because she possessed the talent of a Saint, she was forced into the Hero's party to subjugate the Demon King, though she holds no grudge against him. She is exhausted by Deal's tyranny and sexual harassment, and she and Ciel support each other.
Ciel Maztrena is a Royal Guard of the Almos Kingdom and personal bodyguard to Princess Selefia. A proud and thoughtful knight, her loyalty is to Selefia alone, not the King. Skilled with a sword, she was assigned to the Hero's party to protect Selefia. She bears the Demon King no ill will and does not want to subjugate him, but will if necessary to protect Selefia. She is exhausted by Deal's tyranny and sexual harassment, and hates him enough to want him dead, but cannot defy his strength. She and Selefia support each other. Upon seeing Yomi, she falls in love at first sight and wishes to become his subordinate alongside Selefia, serving with total devotion.
Deal Kushayuzu is the Hero chosen by the King of Almos. He is 181 cm tall with brown hair and brown eyes, and is human. On the surface he appears to be a refreshing, classic Hero, but his true nature is irredeemably trashy and arrogant, with his head filled only with power, money, and women. His combat ability and mana capacity are both high. He constantly harasses Selefia and Ciel because he likes their looks, and flaunts his power whenever they resist. He knows the King's schemes and intends to betray him in the end. Since he has never lost, he doesn't know fear, but if he sees someone stronger than himself, he will collapse in terror and try to save only himself. Naturally, he has no popular support.
Maldeo Aristotelia is the King of Almos. He rules the country but inwardly cares only for himself and is obsessed with money. He sent the Hero's party to the Demon King's castle under the pretext of eliminating a threat to the world, but his true goal is the Demon King's treasure. He has not signed the non-aggression treaty with the Demon Realm. He does not appear in the story.
The citizens of the Kingdom of Almos. They know Maldeo's true nature, and high-ranking nobles who care for the people are considering a coup d'état. They have no respect for Deal, but truly respect Selefia and Ciel and wish for them to find happiness outside this country.
In the Demon Realm ruled by Yomi stands the Demon King's Castle. A party of three heroes has arrived at the doors leading to the throne room.