His total mana capacity is equal to or greater than that of the Demon God Laplace. Because it is abnormally vast for a human, those who can see mana, like Kishirika, find it unnatural and describe it as "creepy." However, because a human body cannot withstand the "mana-to-the-limit" fighting style used by Laplace, he cannot become as strong as Laplace himself. Regarding voiceless incantation, it is a technique so rare that there was only one other user at the Ranoa University of Magic.

Originally from Buena Village, she was bullied in her childhood for her green hair. Rudeus saved her, and they became close friends, leading her to develop feelings for him. Her hair was originally green, but it turned white due to the effects of the teleportation incident and mana exhaustion. She is the same age as Rudeus, born one month earlier. As a result of Rudeus's education from a young age and her own efforts, she possesses a considerably high mana capacity and can use magic without incantations. Voiceless incantation is a technique so rare that there was only one other user at the Ranoa University of Magic. She can use voiceless healing and detoxification magic, which Rudeus cannot do. Since she cannot use two types of magic simultaneously like Rudeus, she activates mixed magic by casting them with a slight time delay.

She has a fragile mentality and is easily cornered. When she first arrived, she was reportedly excited about a world of swords and magic, but she couldn't adapt to phenomena that ignored physical laws or the differences in lifestyle, leading her to keep others at a distance. Her attitude softened after she began cooperating with Rudeus. Since he saved her in Chapter 15, she has prioritized Rudeus's future over her own return. To find her friends Akito Shinohara and Seiji Kuroki, who might have come to this world with her, and to find a way back to Japan, she mastered the human tongue in one year. In the following year, she used her knowledge of modern Japan, the backing of the Dragon God, and her own negotiation skills to earn money in the Asura Kingdom. In the year after that, she used teleportation circles to travel the world. At the Lower Jaw of the Red Dragon, she sensed that Rudeus, who was about to be killed by the Dragon God Orsted, was a fellow transmigrator and interceded to save his life. After being told by Armored Dragon King Perugius, "Perhaps you were summoned to this world by someone," she enrolled in the Ranoa University of Magic to research summoning arts. She later reunited and formed a cooperative relationship with Rudeus. Furthermore, with the help of Cliff and Zanoba, she succeeded in summoning plastic bottles and watermelons. In exchange for sharing her research results, she receives instruction in summoning arts from Perugius at the Sky Fortress.

One of the three heroes who slew the Demon God, and the master of the Sky Fortress Chaos Breaker. The child of the first Armored Dragon King Dora and the current Armored Dragon King. He was named by Laplace at Dora's request. He is one of the ancient Dragon Race who transferred to the modern era via a reincarnation method, but he has no memory of his past life. An authority on summoning magic, he possesses God-level skill in summoning and barrier magic, while his other skills are generally at Saint-level. He is served by twelve familiars, and he himself attacks with mana claws after weakening enemies with the Front Dragon Gate and Rear Dragon Gate. His individual combat ability is Emperor-level, and including all his summons, he ranks among the lower seats of the Seven Great World Powers. He dislikes the Demon Race and forbids them from entering the Sky Fortress. However, he is deeply loyal to his debts; he granted permission to sell dolls of Ruijerd Superdia, a demon who saved his life during the Laplace Campaign. He has a deep appreciation for the arts and is on good terms with Zanoba Shirone. He also responded favorably to Rudeus's creation of deformed dolls that simplify and abstract the human form. However, he dislikes Asura Kingdom artworks created solely for noble vanity.

The grandson of the Pope of the Millis Church. A quarter-blood with a half-human, half-hobbit father and a human mother. Consequently, he is short in stature. While his magical talent is exceptional, he is an amateur in combat, only slightly better than a common brawler. After meeting Elinalise, he demonstrated a talent for magic item creation, developing items to mitigate the curses of Elinalise and the Dragon God Orsted. He has been instrumental in the development of Zariff's prosthetic arm and the Magic Armor.

An Elf with beauty like a high-born lady, sporting luxurious rolls of shining blonde hair. A former member of the adventurer party "Fang of the Black Wolf." After joining up with Rudeus, she followed him to enroll in the University of Magic in Sharia, Ranoa Kingdom. While scouting for men at the academy, she was confessed to by Cliff, who had fallen in love at first sight. She was moved by his passion and began a relationship with him.

The third prince of the Shirone Kingdom. He has a long face and wears round glasses. A severe doll fetishist, he had no interest in anything other than dolls and hated humans as beings that restricted his freedom. However, he was captivated by the Roxy doll made by Rudeus, leading him to idolize Rudeus and become his apprentice. Born as a 'Blessed Child of Monstrous Strength,' he possesses the power to easily rip off a human head and a sturdy body that nullifies most physical attacks, though his defense against magic and heat is low.

The second princess of the Asura Kingdom. The only daughter of the Asura Queen Consort, she is third in the line of succession despite being female. She has smooth, long blonde hair in braids and a charismatic voice that is pleasant to hear. She is considered the most beautiful girl among the characters. She possesses both sadistic sexual desires, becoming aroused by pinning down and dominating the strong, and masochistic desires, becoming aroused by being pinned down herself.

The second son of the Notos family and Ariel's guardian knight. He is Rudeus's cousin. He wears his brown hair swept back and has one of the best faces in the Asura Kingdom. He has received elite education as a guardian knight since birth, but his sword skills are mediocre—Intermediate in Sword God Style and Beginner in Water God Style; Sylphie flatly stated he is weak. However, he has served as Ariel's bodyguard since he can remember, possesses high loyalty, is trusted by Ariel, and shares a strong bond with his comrades. A womanizer, he is popular due to his looks and wealth of conversation topics, often surrounding himself with women and claiming he only dates up to two at a time—one for each arm. However, because he has a history of sleeping with women and then silencing them with money, he is loathed by some girls like a snake or scorpion. Like all Notos men, he loves large breasts. While confident in his eye for women, he lacks an eye for men and had misunderstood Rudeus's character.