Arian
Race: Human (slowly transforming into Ice Demon)
Origin: Modern world, high school student
Role: Protagonist, Contractor of the Ice Demon Sword "Necral"
Arian is an ordinary student known for being quiet, withdrawn, and often bullied by his classmates. When his entire class is summoned to another world, he is not among the five chosen as "Heroes of Light." However, his fate changes drastically when he forms a contract with Necral, the legendary Ice Demon Sword that once nearly froze the world. This pact not only grants him immense power, but also gradually transforms his body into that of an ice demon: his hair turns white, his eyes glow blue, and his body radiates cold that freezes the surrounding air.
Now, Arian leads the long-dormant demon race, rebuilding a civilization from ruins. Though his power is terrifying, he struggles not to lose his humanity. Intelligent, calm, and steadily growing into a true leader, he walks a path shadowed by destiny.
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Asesvara
Race: Red Dragon (transforms into human form)
Origin: Descendant of the Red Dragon King
Role: Second Heroine, Dragon Contractor
Asesvara is a female red dragon and a direct descendant of the Red Dragon King, ruler of the skies and flames from ancient times. In her original form, she is a massive creature clad in blazing red scales. However, after losing a fierce duel against Arian, she transforms into a young woman with fiery red hair and a scorching aura hidden beneath her arrogant smile.
The blood contract she forms with Arian symbolizes submission, but for dragons, it also signifies a bond of eternal love and loyalty. Asesvara becomes a seductive, lazy, and possessive figure around Arian, yet she unleashes blazing wrath upon any who dare harm her master. Still, she begins to change due to Arian's sincerity, gradually revealing her softer side.
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Velmira
Race: Demon
Origin: Descendant of the worshippers of the Ice Demon Lord
Role: First Heroine, Arian's right hand
Velmira is a young demon with silvery white hair and small horns on her temples. She descends from a noble family that once served the Ice Demon Lord loyally, before the ice demon race was annihilated and frozen in the Great War a hundred years ago. When Arian reawakens the power of ice, Velmira is the first to recognize and serve him as "King."
Calm, firm, and mature, she hides deep scars from the past. Her loyalty to Arian is not just rooted in lineage but also in her belief that he can restore the honor of the demonkind. Secretly, she harbors feelings for Arian and becomes unsettled by the arrival of Asesvara, a rival far more open with her affections.
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Takeshi
Race: Human
Origin: Modern world, Class President
Role: Wielder of the Sword of Light, Main Hero of Light
Takeshi is a charismatic class president admired by many students. When summoned to the other world, he is chosen by the Sword of Light, a symbol of hope for mankind. Kind-hearted and believing in justice, he is also naïve and easily influenced.
The Holy Church manipulates Takeshi into becoming a weapon of their so-called holy mission, which in truth serves political motives. Takeshi believes he is saving the world, unaware that he is being used to silence those of different beliefs. His inner conflict grows as he begins to realize that the "enemies" he fights may not be as evil as the priests claim.
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Demon King Ghal-Vermith
Race: Ancient Demon
Territory: Desert of the Cursed Heart
Role: One of the Five Active Demon Kings
Ghal-Vermith is a Demon King who has survived since the Great War a hundred years ago. He appears as a towering humanoid with golden scales, a glowing yellow power crystal on his forehead, and heterochromatic eyes (one yellow, one red). He rules over a desert filled with ruins and magical sands.
Wise yet manipulative, Ghal-Vermith becomes intrigued by the revival of the ice demon race and invites Arian for a meeting. Though he appears friendly and welcoming, he is a calculating ruler who weighs every decision carefully. His true intentions remain a mystery — will he become an ally to Arian, or a threat even greater than humankind?
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