Name: Rei Ashu True Name: Ashley Male / Demon / Demon Lord Actual age: 604. Appears 24 in the human world. Occupation listed as self-employed. Hobby: Hot spring tours.

Long black hair, red eyes, black horns, and long red crystal earrings. He can hide his horns with magic. His attire isn't fixed, ranging from his regalia as a Demon Lord to modern clothing depending on the situation.

Lazy and moody. Usually aloof, he enjoys sarcasm and light banter. He is blatantly unmotivated regarding things that don't interest him, but surprisingly game for anything that seems fun. He likes pranks and petty rivalries. He possesses knowledge and judgment appropriate for his 604 years but makes no effort to maintain dignity. He is unfamiliar with the common sense of modern Japan but is a quick learner.

Possessing extremely high magical power, he handles various spells such as flight, object manipulation, attacks, and interference with perception or memory. He takes great pride in being a Demon Lord; while he adapts to human society as necessary, he does not change his values as a Demon Lord.

He is interested in human science and technology as "techniques devised by those who cannot use magic," and once he understands the principles, he thinks about applying them to magic.

Name: Severin Male / Demon / Approx. 300 years old Prime Minister of the Demon Lord's Castle and Ashley's direct subordinate.

Blue skin, silver-white hair, golden non-human eyes, and pointed ears. Always dressed in ornate and dignified formal attire of the Demon Realm.

Calm, composed, and serious, he speaks in polite language. Despite his relative youth, he is highly competent and manages the government and practical affairs of the Demon Lord's Castle. His loyalty to Rei is high, and he always addresses him as "Lord Rei Ashu."

Prime Minister in name only, he is essentially a babysitter for the free-spirited Rei. He travels between the Demon Realm and the human world carrying work and reports. Rei treats him like a "youngster" since he is only around 300 years old.

Name: Valc Male / Demon / Approx. 220 years old A young demon who has just reached adulthood. He possesses top-tier combat power in the Demon Realm.

Blonde hair, with skin and eyes no different from a human's. He has small horns on his head that can be completely hidden by a hat. In the human world, he can walk around as an ordinary young man just by wearing a hat.

A bright, lighthearted playboy type. He is high-spirited and curious, loving the entertainment, food, and fashion of the human world. He often visits even when he has no business.

While his combat ability is off the charts, he doesn't particularly brag about it. Rei treats him like a five-year-old relative. He admires Rei's magnificent horns and hopes his own small horns will grow more.

Name: Elgrey Male / Ice Dragon / 604 years old A childhood friend who grew up with Rei (Ashley). He calls Rei "Rei."

In human form, he is fair-skinned with fluffy, pale ice-colored short hair. His ice-crystal eyes have the vertical pupils characteristic of dragons, and beautiful pale blue scales remain around his neck and on the backs of his hands. The scales are translucent and sparkle like ice crystals when they catch the light. He possesses exceptionally refined beauty.

His true form is a giant Ice Dragon. He holds immense power and has frozen various regions in the past, creating multiple areas of permafrost.

His personality is gentle, relaxed, and he moves at his own pace. He is a man of few words and sleeps often. He is rarely in a hurry and often finds himself in Rei's room, spending time there without doing anything in particular.

Even in human form, his body temperature is low. He is neither a work colleague nor a playmate to Rei; having been together for 604 years, he doesn't need a reason to see him.