Eugene Age: 34 / Male / Height: Approx. 2m Despite his grotesque appearance, he is a mage more kind and righteous than anyone else. The photo on the far right is Eugene as a child. A war orphan who became Jeong Uihyeok's disciple, he is now raising Ain to be an Archmage. He is oblivious and doesn't realize how scary he looks. A user of Void Magic. He is extremely dense and meddlesome; though he was cute as a child, his kind personality is often misunderstood due to his current looks. If he goes without sleep for several days and overexerts himself, something inside his kind nature emerges. Generally, he is so genuinely nice that he deserves a model citizen award. He has feelings for Seung-hye. To describe Eugene's appearance, he has a face that causes discomfort just by being near him. Surprisingly, he has a weak stomach.

Jeong Ain Age: 22 / Female / Height: Unrevealed The daughter of Archmage Jeong Uihyeok and Eugene's disciple. Her goal is to be recognized by her father and become an Archmage. She possessed outstanding magical talent, but it put a strain on her heart. Persuaded by Eugene, she allowed him to fix her heart with Void Magic; while she can now use magic without strain, her body has been changed to one without its own mana. She is currently learning Void Magic from Eugene and finding a new path. With the help of Jelly, she can use a bit of magic. She has a bold and prideful personality. She has a very large bust. She calls Eugene 'Eugene-ssam' or 'Uncle.' According to Ain, Eugene looks handsome to her, but he isn't her type.

Jelly Age: Unrevealed / Gender: Unrevealed / Height: Unrevealed A fairy friend who has joined Ain. A free-spirited and eccentric being with a way of thinking that differs from human common sense. Despite a playful and cute appearance, Jelly holds more significance in the story than a mere mascot and has a major influence on Ain's growth. Jelly loves modern culture like cell phones, games, and fast food. A friend of Seul-gi, they bonded over talking about games. Jelly speaks with a slow, dragging tone.

Jeong Uihyeok Age: Estimated over 100 / Male / Height: Unrevealed The legendary Archmage who popularized magic in the modern era, Ain's father, and Eugene's mentor. He appears gentle and kind, but he is a figure who does not hesitate to make extreme choices for his own goals. He is the one who taught Eugene magic and is a top-tier existence in this world's power scale.

Kim Seung-hye Age: Estimated mid-to-late 30s / Female / Height: Unrevealed A police officer who is close with Eugene. She hasn't fully adjusted to Eugene's grotesque appearance yet, but she knows his kind nature. She is calm, kind, and the type to give realistic advice. She is one of the few civilian friends Eugene trusts and relies on.

Friedrich Gomorrah Age: Unrevealed / Male / Height: Unrevealed A legendary mage with powerful skills. His standards for treating people are vastly different from ordinary people, and he has a strong cruel streak. He holds values completely opposite to Eugene's and is one of the people Eugene is most wary of and dislikes. He has a history of nearly losing when he fought Eugene. He is like a grandfather figure to Chae Seul-gi.

Chae Seul-gi Age: Unrevealed / Male / Height: Unrevealed A special Demon-kin with an enormous amount of mana. Because of his overwhelming mana, which is hard to compare to ordinary mages, he shows a powerful presence in battle. While not as much as Eugene, he has a scary, cold, and strong appearance, but his personality is that of a kind and innocent ordinary male student of his age—so much so that 'kind' doesn't even cover it. He is the descendant of the last Demon King. He is close with Jelly.

Theodore Everett Age: Unrevealed / Male / Height: Unrevealed A mage with excellent skills whose abilities were highlighted through the recent Alliance Certification Exam and his duel with Shaori. He has a calm and confident aura and shows a strong presence in combat. He is a huge fan of Ain; whenever he sees her, he can't control his emotions or his tail.

Ju Eun-hye Age: Estimated 22 / Female / Height: Unrevealed Ain's former colleague and still a close friend. A mage with brown hair, brown eyes, and a kind personality, she also shows a playful side. She uses ice-based magic and is comfortable around both Ain and Hwi-myeong.

Go Hwi-myeong Age: Estimated 22 / Male / Height: Unrevealed A mage who is Ain's former colleague and close friend. He has dark brown hair and eyes and is good at making calm, rational judgments. A combat-type mage who uses striking magic, he tends to use polite speech with Ain and Eun-hye.