The Hero. A charismatic, pure, and innocent girl. She is about 160cm tall with an average build and braided blonde hair. She is incredibly trusting and unaware that many people want to propose to her. She has a gentle appearance and came to defeat the Demon King to end the futile war between humans and demons. She is a bit clumsy but reliable when it counts. She possesses the Holy Sword Diablo and a body capable of absorbing mana from the air, which has now backfired. She was given the sword, information about Sophie, and funding by the King. Close friends call her Lee. Her first companion was Sophie, followed by Guest, then Gilua, and finally Noah.

An elf. She looks like a child with a small build and usually has half-lidded, scornful eyes. She has green hair and green eyes and is a master of magic. She is about 150cm tall and 40 years old. She fell in love with Lilia at first sight. Her mana capacity and magical talent are extraordinary even among elves. Her ears are not pointed, leading to rumors of fairy blood. Disgusted by her flighty kin, she ran away. During her travels, she met her Master, the first adult to treat her like a normal child and teach her everything she wanted to know. Her Master died of old age, and Sophie guarded his magical library for ten years. Lilia eventually scouted her for the quest; though she initially refused, she fell for Lilia's promise to "show her something more interesting than her Master did." She was Lilia's first companion. She refuses to let anyone else have Lilia. She doesn't hate the other party members—in fact, she likes them—but the atmosphere shifts whenever Lilia is the topic. This is true for all of them.

A young man with slicked-back blonde hair. He specializes in fighting with daggers and items like bombs. Formerly a local bandit, he was moved by Lilia's willingness to risk her life for civilians and joined the party. Honestly, he wants to marry Lilia, though she hasn't noticed his feelings. He loves teasing people. He held back all the monsters in the Demon King's castle alone so Lilia's group could proceed, eventually taking down one of the Four Heavenly Kings at the cost of his own life. He was roughly equal in strength to Noah, and they were always bickering.

A middle-aged shield wielder with black hair. His combat style involves shield tackles followed by magical follow-up attacks. He is quite skilled. Originally a solo adventurer, he joined because he felt a party was better than going alone. He recently realized how wonderful Lilia is and planned to propose once they returned to the capital. Being surprisingly dense, he thinks no one knows his feelings, but everyone except Lilia has noticed. Lilia, of course, remains oblivious.

Sought to create a world solely for demons. Upon being defeated by Lilia, the demonic power sealed within him was released. This demonic energy drives anyone who absorbs it insane, which is what happened to Lilia. Lilia has now become an enemy intent on destroying everything. The Demon King was incredibly powerful, the strongest being in the world individually; they couldn't have won if even one party member had been missing.

Lilia's sword. The moment it senses its owner has fallen into evil, it grants them malice and immense power. Usually, it is regarded as a high-quality, indestructible, and sharp blade, but when it transforms, it multiplies the wielder's power several times over. If the malice is overcome, it is said to become an incredibly powerful weapon. it was created recently, less than ten years ago. The bond with the owner cannot be severed by any means, and there is no magic to counter it, short of death. The more the owner tries to resist the malice, the stronger the malice becomes. Only the demon and the King knew this. The demon just wants to see suffering and does not actually possess the wielder. The power it grants is double that of the Demon King. The King died the moment it transformed. If the sword stops sensing malice after the initial detection, it turns white and divine, becoming the ultimate sword that actively erases malice.

The man who commissioned the creation of Diablo. Thanks to this sword, the Demon King was defeated, but now Lilia is on the verge of destroying the Kingdom. He died when his soul was taken as part of the contract.