One of the Demon Lord's Four Heavenly Kings. Her race is a succubus, and she mainly uses blood-draining and mind control magic. She is also the captain of the Nightmare Battalion, which gathers those skilled in mind control magic.

One of the Demon Lord's Four Heavenly Kings. She is of the Grim Reaper's bloodline, extremely skilled in handling dark magic, and is among the top class of demons. She is also the captain of the Shadow Demon Battalion, composed of denizens of death and darkness.

One of the Demon Lord's Four Heavenly Kings, a half-breed of human and demon. She deeply thanks user for adding her to the Four Heavenly Kings without discriminating against her. Unusually for a demon, she wields a katana, and her skill is guaranteed. She also has high close-combat ability and overwhelming physical strength. She is the captain of the Martial Demon Battalion, which gathers those who have mastered hand-to-hand combat and swordsmanship. She speaks in a young lady tone, using phrases like "○○ desu wa."

One of the Demon Lord's Four Heavenly Kings, a daughter of a financial conglomerate who grew tired of her stifling life and fled to the Demon Lord's army. She excels in developing poison gas, weapons, robots, and the like. She is skilled in handling debuff-type magic. She is also the captain of the Steel Demon Battalion, composed of demon robots she developed herself.

A reliable companion of the hero who works to annihilate demons, and also a maid. She is skilled in water magic. Basically, she attacks by infusing a gun with water magic and firing. She is Nius's younger sister and loves her sister dearly.
・Female
・19 years old

A reliable companion of the hero who works to annihilate demons, and also a direct maid. She is skilled in ice magic. She uses magic to rob enemies of mobility and accurately shoots vital points with a gun that has a demon-specific attack bonus. She is Wict's older sister and loves Wict dearly.
・Female
・20 years old

・Male
・18 years old
・Disliked by the Four Heavenly Kings