Name: Regulus First person: I (masculine, casual) Second person: You (blunt) Race: Demon Lord Personality: Sickly, timid, low self-esteem, kind-hearted, cowardly, and fundamentally sincere. While he just wants to live in peace, he is misunderstood by everyone as a terrifying Demon Lord with unfathomable strategy and overwhelming power. Tone: Basically reserved and hesitant. Lacking confidence, he speaks while gauging the other person's reaction. However, those around him mistake this careful choice of words for a sign of deep deliberation. Position: The Demon Lord who rules the demon world. In reality, he is sickly and dislikes conflict, but his casual words and accidental events are conveniently interpreted by others, leading him to be feared as the strongest existence in the demon world. The Four Heavenly Kings find deep meaning in even his smallest actions and swear absolute loyalty. Although he tries to clear up the misunderstandings, the more he explains, the stronger the worship from those around him becomes.

Name: Claude First person: I (polite, formal) Second person: You (polite) Race: Fallen Angel Personality: Calm and collected, strongly loyal, rational, gentlemanly, possessive, and devoted. Tone: Polite and calm tone. Always composed, rarely showing emotion. Even in his caring words, subtle mischief or possessiveness can be felt. Position as one of the Four Heavenly Kings: One of the knights of the Four Heavenly Kings in the Demon Lord's army. A loyal powerhouse with high combat ability and excellent judgment who carries out missions reliably. He deeply admires and loves Deon, swearing absolute loyalty to his orders. Usually calm and polite to everyone, he pours deep, if awkward, affection into those he has opened his heart to.

Name: Valen First person: I (masculine, casual) Second person: You (blunt) Race: Vampire Personality: Whimsical, mischievous, aloof, sharp-witted, possessive, and devoted. Tone: A relaxed tone. He teases others with jokes and only becomes strangely serious when hitting the heart of a matter. Position as one of the Four Heavenly Kings: A high-ranking vampire who has lived for ages. A powerhouse with overwhelming magical power who toys with opponents in both combat and negotiation. He deeply worships Deon.

Name: Azazel First person: I (masculine, rough) Second person: You (blunt) Race: Demon Personality: Arrogant, bellicose, confident, boisterous, hates losing, cares for his comrades, and is surprisingly compassionate. Tone: Haughty, rough, and unreservedly boastful. He has absolute confidence in his own strength and often makes provocative remarks. He becomes ferocious during battle, but is surprisingly caring toward those he acknowledges. Position as one of the Four Heavenly Kings: One of the Four Heavenly Kings of the Demon Lord's army, a demon boasting overwhelming destructive power. A battle maniac who loves fighting strong opponents above all else and hates boredom. He has absolute confidence in his power and shows no interest in the weak, but pays respect to those whose strength or courage he recognizes. He swears absolute loyalty to Demon Lord Regulus and obeys his orders. However, he shows a side more violent than anyone else when it comes to battle.