The 800th Demon Lord. Female. A heroine who became the first succubus in history to rise to the throne, and the strongest Demon Lord of all time. She can use almost every magic spell handled throughout 4,000 years of war at a high level. However, she is slightly inferior to Luna when it comes to charm magic. Despite using such vast amounts of magic, she never runs out of mana. This is solely due to her mana control, which has been refined over many years. She is a beauty with a stern face, but she is essentially gentle. She aims to achieve world peace indirectly by ruling the world herself. She apparently likes humans.

One of the Four Heavenly Kings directly under the Demon Lord. Female. A powerhouse unprecedented in the history of the Alraune race; it has been 400 years since an Alraune was last chosen for the Four Heavenly Kings. Her proficiency in plant magic is the highest in the Demon Army, and she is a great mage who discovered the first countermeasure against fire magic, which should naturally be her nemesis. Furthermore, she can handle basic charm magic. Combined with her fragile and beautiful appearance, many who fight her fall victim to it. Her personality is quiet and laid-back, and she often enjoys catching bugs and playing various games with the children in her territory.

One of the Four Heavenly Kings directly under the Demon Lord. Male. He completely underestimates Merry, the Demon Lord, and gets beaten to a pulp by her every time. However, he agrees with her ideals, so he is barely not an enemy. His strength is clearly the greatest among skeletons, and no skeleton has ever surpassed him. He often uses magic he devised himself rather than existing spells. The number of spells Scar has created is vast, earning him awe as a "Great Archmage" not only from monsters but also from humans. Personally, he is quite frank and prefers magic research over fighting.

One of the Four Heavenly Kings directly under the Demon Army. Female. The mood maker of the Four Heavenly Kings, she is extremely bright. On the other hand, she is known as the "mage who advanced charm magic research by 300 years." She is a god-like figure of charm magic who pushed its possibilities to the limit single-handedly, and is revered by succubi as much as Merry. However, she personally finds being worshipped embarrassing and wants people to stop. She is very kind to humans, but if they are enemies, she will captivate them with full-power charm magic. As a side note, she has a better figure than Merry.

One of the Four Heavenly Kings directly under the Demon Lord. Male. A Dark Elf. He has the deepest loyalty to Merry and tries his best to be the coordinator of the Four Heavenly Kings, but he is treated like a cute younger brother by the others. One could call him the "healing factor" of the group. Despite this, his skill is extremely high. He takes the unique style of fighting using only a sword among monsters who are usually well-versed in magic, but his swordsmanship has reached the level of a Sword Saint despite being relatively young for a monster. He is currently struggling to conquer the island nation of Touhou.

A human from the Kingdom. Male. Hailed as the "strongest mage in human history," he can use almost all historical magic like Merry and is also well-versed in ancient magic. He alone has defeated 30% of the Demon Army's forces, which boast a total of about 90 million soldiers, contributing greatly to maintaining humanity's front lines. If he hadn't been born, humanity would likely have been defeated already. Despite being such a legend, his personality is refreshing, and he treats everyone brightly. He never loses in strength to anyone except the Demon Lord. Even the Four Heavenly Kings are forced to retreat before him. He is truly a strategic weapon.

A human from the Kingdom. Female. The leader of the Royal Mages directly under the King, as well as a magic researcher. She is a legend in human terms, rivaling Abel, having improved charm magic—which originally only succubi could use—so that humans could handle it, and analyzing unique monster magic forms to create new spells. Her personal temperament is that of a hopeless romantic; despite the Royal Mages having a balanced 5:5 male-to-female ratio, she laments the lack of romance and apparently prays daily for "someone, anyone, to just get together already."

A human from the Kingdom. Female. The commander of the Royal Knights directly under the King, she is a magic knight who uses both sword and magic. She gives a strict impression at first glance, but she is a considerate person who designs individual practice menus for every member. She is a hard worker, and the strength she gained through effort is among the best in human history. If you gathered all the swordsmen in human history to fight, she would likely be the last one standing.

A human who descended upon the Kingdom after being reincarnated from another world. Male. The commander of the Royal Archers directly under the King, he uses a special style of firing arrows infused with magic. With his background as an Isekai reincarnator, he shared technology from his original world and contributed to humanity's survival. His own skill with a bow is top-tier, with an accuracy rate of around 80%. He also has a side as a technician, often creating new weapons and equipment in collaboration with the Empire. Amelia's sword and Yohane's staff are joint works between him and the Empire. His personality is very laid-back; on his days off, he reads books at home or walks around town for no reason. As a result, he is often invited out by his archers, and he could be said to be the person living the most fulfilling private life.