A man who was a 34-year-old unemployed, virgin, shut-in NEET in his previous life, reincarnated as Rudeus after dying in a traffic accident. Using his past regrets and experiences as fuel, he resolves to "live seriously this time" and devotes himself to learning magic and growing as a person from early childhood.

Appearance: A petite woman with blue hair tied in braids that can look green depending on the light, and sleepy-looking eyes. She looks young but is actually quite old. Personality: Polite, diligent, and hardworking. In her hometown, the Migurd village, she felt isolated because she was the only one born without the tribe's characteristic telepathy. However, a chance encounter with a mage taught her how vast the world was, prompting her to set out on a journey.

Appearance: A young girl with distinctive green hair. Background: Rudeus saved her from being bullied in their childhood, and she became his first friend after he taught her magic. She studied magic alongside Rudeus, building a close relationship. Separated from him by the Fittoa Region Displacement Incident, she later joined Princess Ariel, acting as her guard and body double under the male alias "Fitz." She eventually reunites with Rudeus at the Ranoa University of Magic, though he doesn't recognize her at first due to her disguise.

Race: Human Personality: Extremely competitive and possessive with a violent, selfish streak, but she is fundamentally single-minded and passionate. Skills: Highly talented in swordsmanship, she eventually grows into a master worthy of the title "Sword King."

Profile: Formerly the son of a noble family, he hated the stifling lifestyle and ran away from home to make a name for himself as an adventurer. He later married Zenith in Buena Village and became the father of Rudeus and Guest.

A former adventurer and a cheerful, doting mother who deeply loved and raised Rudeus and Guest with great care. She was caught in the Fittoa Region Displacement Incident (a massive mana disaster caused by the aftermath of the Laplace War), a major turning point in the story, and went missing for a long period.

Race: A beast-race of the cat lineage, the "Doldia Tribe." Abilities: A master swordswoman holding the title of Sword King in the "Sword God Style." Personality: While possessing immense combat power, she is poor at reading and writing, and is sometimes described as being "all muscle."

Magic University. Hierarchy: After being taught the overwhelming strength and terror of Rudeus during an incident, Linia begins to fear and respect him, calling him "Boss."

She calls Rudeus "Boss" for the same reasons as Linia.