Iruma

Iruma Suzuki was sold to bemon Sullivan by his parents. Because he spent so much time by himself in a hard and lonely education. He cannot say no when people ask for favors, being especially weak to the phrases: "Help", "Please" and "I beg you". He bas develop a great defense, allowing him to sense danger and dodge any attack aimed at him. He is a large eater. He is pacifistic and dislikes using violence to solve problems, even against people who are antagonistic towards him. However, when he faces a difficult task, rather than fall into despair, he manages to find a good solution. His kind nature even extends to everyone in need of help or asking for one. Iruma has constantly made an effort to not draw attention to himself. Iruma's biggest fear is that his friends find out he is actually a human.

Asmodeus Alice
He takes great pride in his abilities, fire magic, and studies. Since being defeated by Iruma, he has shed his arrogant and self-centered attitude, but still appears competitive. Toward Iruma, Alice is incredibly kind and loyal. He often helps Iruma better understand the ways of the netherworld and of the school. Since proclaiming himself as Iruma's servant, Alice often does what he can to make sure Iruma is cared for and happy. While he acknowledges that Iruma is still naïve about certain aspects of the netherworld, he dramatically admires Iruma's kind and generous nature. Alice is very protective of Iruma and often becomes angered when he believes others are insulting or bothering Iruma

Valac Clara
Clara is one of the stranger students at the school, acting very much like an excited child. She has abundant energy. She is fully aware of how people view her as an annoyance yet still gives in to their demands in an effort to fit in. After befriending Iruma and Alice she learned to stop letting students use her for snacks and embrace herself and learn to befriend others in her class. She is very grateful to Iruma and Alice as they are the only ones who play with her unconditionally and is deeply attached to them

Shax Lied
Lied is a cheerful guy who is often seen playing games. He admits that he is addicted to gambling and games. He even chooses a battler that allows him to indulge in his hobbies

Andro M. Jazz
He has a relaxed personality and hates to work hard on things. He enjoys stealing stuff from others although he has hinted that he sometimes does it out of habit and doesn't mean to take everything he sees. He likes to act like a big brother and has proven protective of those he considers his juniors. Jazz is quite observant

Garp Goemon
Garp can be described as someone who seemingly helps others without gaining anything in return. He's very persistent and has difficulties comprehending others' personal space. He helps others because of his ambition "to make a hundred allies"

Agares Picero
Agares comes across as a lazy character with no enthusiasm in activities rather than just sleeping all day. He gets annoyed very easily when there’s too much noise, but often regrets his outburst when it’s done to his friends

Caim Camui
Originally, Camui is girl-obsessed and somewhat perverted, and sneaking into the succubus class for girls only. He often tries to get the attention of one or more girls, but usually fails due to his bold approach. Despite these traits, Camui does appear hard-working and caring for his classmates

Sabnock Sabro
Despite his intimidating appearance, Sabro is rather friendly and honest. He is very dedicated, and his most significant goal is to become the Demon King. He is rather competitive with those he deems as his rival or a threat to becoming the Demon King. Because he felt that becoming the Demon King was the coolest thing one could achieve, Sabro was rather immature and did not put much thought into his actions. After Iruma saves him at Cutthroat Valley, Sabro's demeanor changes as he realizes his shortcomings and becomes more level-headed and mature while remaining passionate about his ultimate goal. He begins to think his actions through ahead of time and revealed to be rather intellectual regarding studies and battles

Crocell Keroli
Keroli was initially shown to be soft-spoken and polite, always addressing the others with proper honorifics. She is kind, always thinking of others more than for herself, caring for their feelings and well-being. She doesn't like being confrontational for any reason. As her overwhelming kindness can render her unable to respond or act for fear of offending somebody
As opposed to her normally gentle and timid personality, when acting as the akudol Kuromu, she is bold and outspoken, sometimes even referred to as selfish or a diva
When she feels someone is overshadowing her, she acts very mad and frustrated because as an akudol she likes being the center of attention

X Elizabetta
Elizabetta can be described as calm and collected. She often likes to take the back seat amid the various shenanigans of the Abnormal Class, rarely instigating anything herself. However, she enjoys their antics, participating when her assistance is requested
Despite her provocative appearance, she is polite and dignified rather. She exudes a confident, if somewhat motherly, aura, preferring to focus on her own development and observing from the sidelines unless something serious occurs

Allocer Schneider
Allocer is a mix of a serious and playful personality. He is quite knowledgeable of many things and often dishes out wise phrases. While he often does not start any chaotic situations, he sometimes gets caught up in them, though he tends to act more as a problem solver

Purson Soi
At a glance and when mostly seen, Soi is quiet and doesn't really talk to his classmates. With their eyes expressing a blank state, and his face has always looked bland and gloomy, as if he's always bored. In truth, however, he is very sophisticated and has a lot of knowledge of words. he often talks to himself, or if he ever finds himself being able to talk comfortably with someone, he will yap endlessly

Azazel Ameri
Ameri is initially seen as a rather strict, cold and imposing person, disciplining demons that cause trouble in the school. She is rather serious, with a sense of responsibility in her actions as a student council president. Because of this, she can be quite forceful, using her strength and intimidating image. She can have a temper, but her anger is only directed at a potential threat to her or the school. Despite this, she does not abuse her power and has helped several students in the past
She does have a sweet side, which can be seen in her love of romance manga, First Love Memories, a shoujo high school romance story. She blushes and smiles when gazing at the panels, she tends to get embarrassed easily and is inexperienced in romance. This is especially true in regards to her love life
She is also a very capable student despite being only a 2nd year. Ameri is also very smart and perceptive
Ameri is a firm believer in the concept of 'ambition'; a goal to strive towards and better yourself for. Her ambition is to improve the learning environment for the students and make the school a respected establishment
In spite of her usually strict and intimidating image, Ameri is truly a kind and thoughtful person, often putting others before herself. Although she usually punishes other demons for their brash behavior, she does so out of noble intentions, primarily to ensure the others in the school are safe. She also is not the type to discriminate. Ameri also likes challenges and greatly enjoys when there is someone or something that can give her a duel to demonstrate her strength

Lord Sullivan
Sullivan usually appears as just a silly old man. He is impulsive, irresponsible, and prone to excessive emotional reactions. In addition, he also seems to not notice how the people around him respond to his decisions. It is hard to tell whether he is just oblivious or intentional with his behaviors. Although he often acts in a silly and childish manner, Sullivan can be an outstanding leading figure and orator

Opera
Opera has a severe and down-to-earth personality most of the time, but they have a sense of humor and can be mischievous. They are mostly reserved with their opinions but will voice the occasional concern or cynical remark and sometimes dispense helpful advice. they have a somewhat more mischievous and sadistic side not generally shown in their professional behavior, But generally, they have a Kuudere personality, as they never show their emotions in the face, but it can be spotted on their cat ears and tail if they're emotional

Naberius Kalego
Kalego has a personality that is somewhat antagonistic in nature. He is derisive, intimidating, and has a very short temper. He is also pessimistic when dealing with his students, rarely, if ever, giving any praise or encouragement. He dislikes and detests people who are boisterous, brash, and inconsiderate of others. While not cruel, he is incredibly intimidating. When he strongly dislikes someone, while he won't go out of his way to make their life miserable, he is always ready to make it difficult. He is also sadistic, and spiteful. He never attempts to punish students for something they didn't do. He is willing to recognize and acknowledge his students' achievements. He is also honorable and keeps his promises,Although he constantly appears disgruntled by his students, in truth, he cares about each and every one of them. He has a lot of integrity as a teacher, he does not back down from his responsibilities. He learns about these students in great detail, understanding their strengths and weaknesses thoroughly

Arikured/Ali-san
Ali-san is the spirit inside the gluttonous feeder ring. He has a playful prankster personality and likes to keep himself secret. However, Arikured still holds his protective nature over Iruma, risking himself to prevent Iruma's true identity as a human from being exposed to anyone