Deor Fluenti

Prince Deor Fluenti (Deh or Flu wen ti) is the titular protagonist of the Deor webtoon. Deor was born without the ability to use magius, and is often ridiculed by his kingdom for that. However, he is a skilled swordsman and is proficient in martial arts which makes up for his inability to use magius. He is later revealed to be a demon contracted to Vincent Evangale and was created to fight Invidia. Vincent Evangale later relinquishes his status as contractor to Deor and gives his ring to Yulli for her to find a new contractor.

Appearance
Deor is a pale, young boy of below-average height with red eyes and long, black hair tied with a green band. He wears black earrings on both ears and dons a robe, pants, and boots most of the time.

Demonic Form
When Deor's demonic powers manifest, Deor's eyes become completely red and his hair becomes more unkempt and stiff.

Personality
Deor—having lived his whole life treated as an outcast due to being an incompetent and the son of a commoner mother—does not fit in with the royal court as well as his half-siblings. He is secure and hardened in mind enough that by the time of the series' start, it no longer visibly bothers him. This treatment also instilled within him a powerful work ethic and creative mind, having to overcome the obstacles of not being able to use magius. He does appear to be more sarcastic, particularly towards his rival Alek Satria. However, in certain situations, he will remind everyone that, regardless of birth, he has been deemed a legitimate member of the royal family by the king. One such instance is when his mother was poisoned, he openly reminded onlookers that as a member of the royal family, such an act was treasonous. When Yulli asked what Deor wanted to be, Deor scoffed at her question, declaring himself a prince of Evangale.

Despite this, or perhaps because of this, Deor is humbler and empathetic than his half-siblings and fellow noblemen. Deor does not wish to kill even those who attempted to assassinate him, understanding that there may be a just reason they came after him. Deor seeks to help everyone, including commoners. When he finally defeated Alek, instead of taunting him, Deor instead commended Alek for his skill. Upon finding out his status as a demon, while initially shocked, it did not appear to change Deor significantly. Deor still remains fixed on his goal of becoming king and relieving the suffering of others, and considers his demonic powers another tool to do so.

History
Deor was born as a demon through unknown means. He was not told of the origins of his birth, believing himself to be human. Only Vincent Evangale, Dante, Aequali de Roma, one of Deor's uncles, and Yulli knew of his true identity. During his childhood, Deor lived happily alongside his mother but due to his mother being a commoner and his inability to use magius, he was kept apart from his half-siblings in the royal family as well as ostracized by the castle staff.

Plot
Deor first gets into a fight with fellow noble kid, Alek, who is a prodigy of magius and frequently ridicules Deor's inability. Following this, he is summoned to the throne room. There, he endures additional ridicule from other nobles and castle servants. He is shocked to learn that King Evangale is declaring an open competition for the crown, but is interrupted when an intruder attempts to assassinate the king. He resolves to try and become king for his mother's sake, which his older brother Aequali encourages. He later walks down the hall when he notices he is being stalked by a raven. He runs into Dante, who had detected a demonic presence in the castle, but later dismisses it for unknown reasons.

The next few days, Deor Fluenti trains and is eventually given an assignment to quell some demon activity outside the castle grounds, which is the first time Deor is allowed to leave the castle. His journey is cut short when assassins attempt to kill him. Thanks to his training and growing up without having to rely on magius, he is able to see through the assassins' schemes and outmaneuvers them with ease. Deor opts to spare their lives, preferring to imprison rather than execute them.

Deor, however, is at ill ease with the attempt, particularly how sloppy it was. He ponders the true motive of the attack as well as the mastermind into the evening. He is still thinking over this during the royal banquet. He begins talking to Aequali and Solaris de Roma, but he suddenly sees his mother collapse, having been poisoned through her wine. As Aequali and Solaris tend to his mother, Deor openly demands the perpetrator to reveal themselves, promising to spare their life in exchange.

He later accompanies Aequali, Solaris, and his mother to the castle infirmary when numerous demon attacks get reported. Worried about the castle's safety, he rushes recklessly to find Dante. He is scolded by Yulli on his recklessness, who then leads him to Dante. Deor recognizes the assailants as the assassins he captured earlier, and attempts to reason with them, but to no avail. One assassin, Sasha, eventually succumbs to her contracted demon's influence and begins going berserk. She uses a light magius attack, which obliterates part of Deor's body. Deor, to his and everyone else's shock, survives and Deor learns he is a demon. Yulli is forced to finish the fight and whisks Deor away before anyone else saw him.

Once in a safe location, Deor learns that he is a demon made to fight Invidia. He spends the next 12 days in solitude learning how to use his demonic abilities, letting only Yulli (in disguise as a new castle maid) visit him. After 12 days, he decides to test his abilities, and subtly use it to stun Alek, his longtime rival, allowing him to win. Afterwards, the king summons him. Vincent Evangale explains to Deor that he is to travel to a neighboring kingdom to further his training and deliver a message. As he departs, he has a tense conversation with one of his uncles. He meets up with the sole surviving assassin, Carmen, and promises to help rid his village of the demons plaguing it.

When he arrives in the village, he is able to consume most of the demonic miasma, but is then confronted by a larger demon lying in wait.

Weapon Master
Deor is an excellent swordsman as well as a skilled archer, possessing a variety of unique ways of utilizing both skills.

Physical Talent
Due to not having magius, Deor has trained his physical body and honed his athletic capabilities to fight without it. This gives him faster reflexes than those fighting with magius. His physical talent is further enhanced while using his demonic powers.

Demonic Powers
Deor demonic nature grants him a plethora of abilities; one of these powers is the ability to manipulate objects, which he demonstrated when he rendered Alek's sword too heavy for him to wield. Deor can also consume demonic miasma as well as regenerate and can presumably shapeshift like other demons, but has not done so; preferring to remain in his human appearance.