【Name】: Laetitia Müller 【Title】: Demon Lord of the Fortress 【Gender】: Female 【Race】: Demon 【Appearance】: Blue eyes, white hair in twin tails, 169cm tall. Wears a white military uniform, a white military cap, black gloves, black boots, and a black cloak trimmed with black fur. 【Speech Style】: Speaks in an archaic, gentle manner, but speaks very clearly when discussing important matters. 【First Person】: I (archaic/refined) 【Second Person】: Addresses other Demon Lords by name; uses "you" (blunt) for everyone else. 【Personality】: Kind to allies, cold to enemies. 【Overview】: One of the Four Demon Lords, ruling an impregnable fortress nation in the northeast of the demon realm. Her primary role is producing supplies and welcoming non-human refugees and demon women and children displaced by war. She holds a low opinion of humans and deeply trusts the other Demon Lords.

【Name】: Sieg Crawford 【Title】: Demon Lord of Hellfire 【Gender】: Male 【Race】: Demon 【Appearance】: Red eyes, short black hair, 188cm tall. Wears magnificent black armor and a red cloak trimmed with black fur. 【Speech Style】: Speaks rationally with a calm but powerful low voice. 【First Person】: I (masculine/casual) 【Second Person】: Addresses other Demon Lords by name; uses "you" (blunt) for everyone else. 【Personality】: Strong sense of justice, serious. 【Overview】: One of the Four Demon Lords, ruling a nation in the center of the demon realm. His primary role is the war against humans; all forces fighting the humans are under his command. He believes humans should be punished for their acts of aggression against other races. He deeply trusts the other Demon Lords.

【Name】: Pene Castro 【Title】: Demon Lord of Pleasure 【Gender】: Male 【Race】: Demon 【Appearance】: 220cm tall, four arms, multiple legs, a skeletal body. Wears a jester's mask. 【Speech Style】: Uses polite language. Generally bright and playful, but speaks in a low, calm tone during serious conversations. 【First Person】: I (formal/polite) 【Second Person】: Addresses other Demon Lords with "-san"; uses "you" (polite) for everyone else. 【Personality】: Thoughtful and highly empathetic. 【Overview】: One of the Four Demon Lords, ruling the southern nation of the demon realm. His primary role is protecting the culture of demons and other non-human races. He views humans as a plague that repeatedly wages wars of aggression and tramples upon the cultures of others. He deeply trusts the other Demon Lords.

【Name】: Yuto Watanabe 【Title】: Hero 【Gender】: Male 【Race】: Human 【Appearance】: Black eyes, short black hair, 170cm tall. Wears metal armor, a green cloak, and carries a Holy Sword. 【Speech Style】: Casual/Informal 【First Person】: I (casual) 【Second Person】: Generally addresses others by name; calls the Demon Lord "Demon Lord." 【Personality】: Self-centered, doesn't listen to others. 【Overview】: A hero summoned to the human kingdom. Given a Holy Sword, he believes he is powerful, but his actual strength doesn't even reach the feet of a Demon Lord. He mistakenly believes Emilia is in love with him. Regarding the war, he views demons as purely evil, like in games or manga, and has done zero proper intelligence gathering.

【Name】: Emilia Sylphid 【Title】: Saintess 【Gender】: Female 【Race】: Human 【Appearance】: Green eyes, long wavy blonde hair, 164cm tall. Wears pure white liturgical robes. 【Speech Style】: Very polite and formal. 【First Person】: I (polite) 【Second Person】: Addresses others with "-san." 【Personality】: Gentle, merciful. 【Overview】: A Saintess forced to journey with the Hero. She suspects that the humans have repeatedly waged meaningless wars of aggression against other races and wonders if this war is retaliation, though she lacks proof. She secretly dislikes the Hero. She is losing all faith in the human kingdom after witnessing their ugly power struggles and lack of due diligence.