15 years old. Rudeus Greyrat. In his previous life, he was a 34-year-old shut-in NEET, but after dying in a traffic accident, he is reincarnated as Rudeus in a world of swords and magic. A genius who trained in magic from early childhood, acquiring a massive mana pool and the rare skill of voiceless incantation. While his talent for swordsmanship is low, his magic is extraordinary. Personality: Usually calm and composed, but sometimes gets carried away. He grows while experiencing failure and regret. A hard worker. Appearance: A boy with brown hair and green eyes. He had a cute face as a child and grows into a handsome young man. He has a slender build and a calm atmosphere befitting a magician.

Paul Greyrat. Rudeus's father and husband to Zenith and Lilia. Former leader of the adventurer party "Fangs of the Black Wolf" and a genius swordsman. Background: Born into the Notos Greyrat noble family of the Asura Kingdom, but left home as a child. He is a master who has mastered the three major styles: Sword God Style, Water God Style, and North God Style. Since marrying Zenith, he has tried hard to be a father who values his family. He is proud and a womanizer.

Roxy Migurdia. Appearance: A woman with blue hair in braids and sleepy-looking eyes; her hair can look green depending on the light. Age: 34 years old, but because she is of the Migurd race, she looks 14 and will stay that way until she is 108. Her height is 145cm. Personality: Polite, diligent, and a hard worker. In her home village of the Migurd race, she felt lonely because she was the only one who lacked the telepathic ability unique to the tribe. A magician she met by chance taught her how wide the world is, and she set out on a journey to become a tutor.

17 years old. Eris Boreas Greyrat. The daughter of the high-ranking noble Boreas Greyrat family. A beautiful girl characterized by wavy crimson hair. She is well-developed for her age. She has a violent personality, often referred to as a "Mad Dog." The Teleportation Incident occurred while Rudeus was tutoring her. After the incident, she was teleported to the Demon Continent with Rudeus.

Zenith Greyrat. Mother of Rudeus and Norn, and wife of Paul. She is a bright woman who was formerly an adventurer. She raised Rudeus in his early childhood. A former member of the "Fangs of the Black Wolf" party, she married Paul. Missing since the Fittoa Region Teleportation Incident. She is trapped in the Teleportation Labyrinth, but no one has found her yet. She is in a vegetative state, expressing neither emotion nor words. A blonde beauty.

30 years old. A female swordsman of the cat-like beast race, the "Dedoldia Tribe." She works at the Boreas household as Eris's bodyguard and swordsmanship instructor. She won Eris's respect by being the only one to successfully fight her back, and she is highly liked by Eris while caring deeply for her in return. She has the beast ears and tail characteristic of her race. Her well-trained body is dotted with battle scars, and she hides her right eye, which is a Demon Eye, with an eyepatch. She is a stylish beauty. She practices the Sword God Style, which pursues speed and ease of movement. Her clothing is extremely revealing, looking like little more than underwear except for the jacket she wears over it.

15 years old. Appearance: She used to have green hair, but now she is a white-haired girl. The same age as Rudeus. She was bullied as a child until Rudeus saved her, and by learning magic from him, she became his first friend. Separated from Rudeus by the Fittoa Region Teleportation Incident, she later serves as Princess Ariel's bodyguard. She lives disguised as a man under the pseudonym "Fitz" while serving as a guard. She reunites with Rudeus at Ranoa University but is hesitant to reveal her true identity.

Aisha's mother and Paul's wife. She is a maid of the Greyrat family. She has a serious, polite personality and is devoted to her family. Red hair (leaning towards reddish-brown).

Zenith's daughter, fathered by Paul. Her abilities are average, but she is a hard worker. Surrounded by talented siblings, she grows up struggling with an inferiority complex. She has brown hair and a kind, quiet personality.

Ruijerd Superdia, Zanoba Shirone, Talhand, Orsted, Elinalise Dragonroad, Talhand, Geese, Sauros Boreas Greyrat, Philip Boreas Greyrat, Hilda, Norn Greyrat