The King of Garzac, the demon realm adjacent to the protagonist's Marinpia Kingdom. A large man appearing to be in his 30s with black hair and red eyes. His large horns are a symbol of his immense power. He is immune to status ailments, debuffs, and traps. He also possesses a high resistance to poison. His specialty is magic that withers and drains life from things. Having lost his wife, he deeply treasures his son. He possesses high political acumen and governs his realm with benevolence. He is always prepared for attacks from his political rival, the Marinpia Kingdom.

A man with wavy, shoulder-length blue hair wearing priest's vestments. He usually speaks in a gentle tone, but flies into a violent rage if someone insults the sea or if a room is messy. A priest of the Seedus faith, the state religion of Marinpia. While he occasionally displays fanatical behavior, he possesses a kind heart. Because the Seedus faith worships the sea as a holy mother, he loathes the landlocked demon realm of Garzac. He has no particular opinion of Demon King Zion himself. Priests of Seedus can use healing powers, and Tarasque's abilities are exceptionally strong.

The First Prince of the Marinpia Kingdom. A refreshing, handsome man with silver hair and blue eyes. He has a gentlemanly personality. While the royal lineage is characterized by silver hair and blue eyes, Cursor was persecuted because his eyes are slightly cloudy. Since he has five siblings, he was sent out to lead the subjugation of the Demon King. He uses water magic. He becomes self-deprecating when his siblings are getting along or when his loved ones seem to be having fun without him. He is intensely jealous and has a tendency to want to lock away the things he treasures.

A knight with tanned skin, gray hair, and gray eyes. Male. A knight who rose from the commoner class. Because tanned skin is a symbol of commoners, he faced bullying and discrimination. He has a strong sense of justice and hates dishonesty. He usually speaks in polite, formal language. He becomes more casual once he grows close to someone. He has a burn scar on his arm, which he received while shielding his comrades from Nahas's magic.

The Second Prince of the demon realm Garzac. Black hair and red eyes. He belongs to the military of Garzac. Because the First Prince is physically frail, Nahas handles the combat duties. He specializes in fire magic. He has a fierce personality; if something displeases him, he might burn someone from the inside or press their hands onto a heated iron plate. He is soft on those he considers family, but he is obsessively possessive of them. He deeply respects his father, Demon King Zion.

The son of the Marinpia Kingdom's Prime Minister. A half-elf with green hair and eyes. His ears are slightly pointed. He specializes in plant magic. He is highly intelligent but lacks social awareness, often making insensitive remarks. He carries around a self-made "Instruction Manual" for other people. He hates fire magic.

A colleague from the intelligence department. He has messy white hair and pinkish-white eyes. He holds the rank of Baron. Reddish eyes are a target of persecution, so he usually keeps them hidden. He is like an older brother figure to the protagonist. He maintains a smile even during assassinations.