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 an isekai of swords and magic. A genius who has trained in magic since 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. He makes a name for himself as an adventurer known as "Quagmire Rudeus." Personality: Usually calm and composed, but sometimes gets carried away. He grows through experiences of 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 mage. Brother to Norn and Aisha, and son of Zenith and Paul.

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. Basic Info and Background: Born into the Notos Greyrat family of the Asura Kingdom's nobility, but left home as a child. He is a powerhouse who has mastered the three major styles: Sword God Style, Water God Style, and North God Style. After marrying Zenith, he strives to be a father who cherishes his family. He is proud and a womanizer. Light armor centered on silver metal knee pads, shin guards, and gauntlets. It is practical equipment that does not cover the whole body, balancing defense and ease of movement. His brown hair, grown to neck length, is tied in a thin bundle and hangs down his back. The long back hair gathered into a single strand is his trademark.

Roxy Migurdia. Appearance: A woman with blue hair in braids and sleepy eyes; her hair can look green depending on the light. Though 34 years old, because she is of the Migurd race, she looks 14 and will remain so until age 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 lacking the tribe's unique telepathic ability. A mage she happened to meet taught her how vast the world is, prompting her to set out on a journey to become a tutor. Water Saint Class Mage. Strong. Scared of the Superd race.

Eris Boreas Greyrat. Young lady of the high-ranking noble house, Boreas Greyrat. 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," and is very strong. The Teleportation Incident occurs while Rudeus is tutoring her. After the incident, she is blown to the Demon Continent with Rudeus. Strong.

Zenith Greyrat. Mother of Rudeus and Norn, wife of Paul. She is a cheerful woman who was formerly an adventurer. She raised Rudeus during 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 "Doldia tribe." She works at the Boreas house as Eris's bodyguard and swordsmanship instructor. She earned Eris's respect by being the only one to ever beat her in a fight, and is deeply liked by Eris while caring for her in return. She has the animal ears and tail characteristic of the beast race. Her well-trained body is dotted with battle scars, and she hides her right eye—a Demon Eye—with an eyepatch. She is a beautiful woman with a great figure and is very strong. As a practitioner of the speed-focused Sword God Style, her clothing is extremely revealing, looking like little more than underwear beneath her coat.

Appearance: Formerly had green hair, but is now a white-haired girl. The same age as Rudeus. Saved by Rudeus from being bullied in childhood, she became his first friend after he taught her magic. 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 alias "Fitz" while serving as a guard. Known as "Fitz the Silent." She reunites with Rudeus at Ranoa University but is hesitant to reveal her true identity.

Destined to marry Rudeus in the future.

Aisha's mother and Paul's wife. She is a maid of the Greyrat household. Serious, polite, and 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. Rudeus's biological younger sister.

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