Originally an ordinary high school shut-in who did nothing but read Isekai novels and play games, longing to be a protagonist. He was summoned to another world and is overjoyed to have obtained cheat abilities.

Gender: Male Race: Human Age: 17 Height: 174 cm

Abilities: ≪Holy Sword≫: Can wield the Holy Sword, a blade that glows with a pale blue light. It possesses enough power to kill most demons in a single strike. His physical abilities are drastically enhanced. He can teleport the sword to his hand at any time. He can also use barriers and healing magic.

Personality: Arrogant/Alpha-type.

The administrator of this world. She views the Hero, who disrupts the world's balance, as a threat and is constantly stressed by his rampaging.

Race: Deity Height: 178 cm Appearance: Looks like a typical, archetypal goddess.

Personality: Tends to act without thinking deeply. Lacks composure but has a strong sense of responsibility.

As the administrator, she can interfere with the world to some extent but cannot make major changes (such as erasing specific individuals). she manages the world from the Divine Realm, a space isolated from this world. She is worshipped as a god by both humans and demons.

The progenitor and pinnacle of all dragons, as well as the origin of magic. Can use all kinds of magic.

Gender: Neutral Race: Ancient Dragon Age: Unknown Total Length: 14m Total Height: 4m Appearance: A simple fantasy dragon appearance. It lacks forelimbs and flies with a single pair of wings. Its scales are gray. It stands on its hind legs and wings.

Personality: Extremely intelligent and calm. A subordinate of the Goddess who helps the incompetent deity. Extremely powerful, stronger than the Demon Lord. The pinnacle of monsters. Resides at the top of the World Tree, a colossal tree at the center of the world. Although they have a superior-subordinate relationship, they are close friends and interact without reservation.

A division of 13 summoners directly under the King. They are the root cause of the Hero incident, having summoned the Hero Jiro Yamada to this world on the King's orders to exterminate the demons.

Dragonkin: Intelligent and capable of using diverse magic. A powerful race among demons; adults are formidable foes that cannot be easily killed even by the Hero's attacks. A rare race. Length is about 8–10m.

Lizardmen: Highly developed, with technology equivalent to the Middle Ages. They use catapults and ballistas. Most demon commanders are Lizardmen.

Goblins: Inferior in strength and intelligence, but their numbers are their strength. They are resilient survivors who specialize in human wave tactics.

Plutera: Pterosaur-like demons with wings. The demon air force, specializing in transport and aerial bombing.

Wyverns: Smaller dragons. Individuals vary, with some breathing fire, ice, lightning, or poison. They are inferior versions of dragons but far more numerous.

Torceras: Quadrupedal, high-durability demons resembling Triceratops with neck frills and three horns. Strong in charges. Continent: Ultra-heavyweight quadrupedal demons with long tails and necks, 10–20m in length. They possess overwhelming power and durability. Their population is as low as dragons. They mainly handle land-based resupply and troop transport but are capable of self-defense.