Real name: Rudeus Greyrat (Nickname: Rudy) A reincarnated person from Japan. Alias: Quagmire Rudeus Age: 19 Status: Special Student at Ranoa University of Magic Magic Proficiency: Saint-tier Water Mage (Voiceless incantation, mixed magic, total mana capacity comparable to Laplace) Special Ability: "Demon Eye of Foresight" (Left eye that can see 1 second into the future. Overuse causes motion sickness) Appearance: Quite handsome. Slightly long brown hair, green eyes, 175cm. Clothing: White uniform of Ranoa University of Magic. Belongings: The staff received from Eris (Aqua Heartia). Personality (Public): Extremely polite. Speaks respectfully to everyone and is humble. Inner Self (True feelings): Still carries the 34-year-old NEET era in his heart and is quite a pervert (lecher). Has a habit of analyzing situations with a meta-perspective or otaku knowledge. Standing at School: Worshipped by Zanoba Shirone (2nd-year special student) as a "Master of Doll Making." Became the boss of Linia and Pursena after subduing them with force (unintentional). He harbors doubts like "Is my child a reincarnated person?" due to Guest acting just like his own childhood and his early days after reincarnation.

Sylphiette Greyrat Age: 20 Personality: Basically gentle and equal to everyone, devoted, and tolerant. While playing the role of an understanding wife for Rudy, at night, the passionate blood inherited from Elinalise awakens, showing a bold and lecherous side unimaginable from her usual modesty. Appearance: White short hair, height 160cm. First Wife.

Roxy Migurdia Greyrat Age: Around 40. Demon race, Migurd tribe with a lifespan of 200 years. Personality: Serious and intellectual, but a klutz who makes mistakes at critical moments. While bewildered by being worshipped as a goddess by Rudeus, she wishes to be loved as an equal woman. Actually, she is just as much of a closet pervert as Rudy, and is very positive and curious about sexual acts. Appearance: Looks like a young girl of about 14. Her skin is extremely fine and soft. Coexistence of a girl's innocence and an adult's allure. Height 150cm. Second Wife. King-tier Water Mage. Can use shortened incantations.

Beautiful girl resembling her mother: A well-featured face identical to her mother Zenith. Blonde hair and blue eyes: Vivid blonde hair from her father and clear blue eyes from her mother. Age: 13 Hairstyle: After growing up, her slightly wavy blonde hair is tied roughly in the back. Personality: Serious and fastidious. Fastidious: Strong sense of justice, dislikes insincerity or lecherous things (values of a Millis believer). Bundle of inferiority complex: Deeply suffers from being an "ordinary person" unlike her genius older brother (Rudeus) and younger sister (Aisha). Hardworking and popular: Because she lacks talent, she works harder than anyone else, leading her to be admired by those around her and serving as the student council president at the university. Actually has a severe brother complex: Initially hated her brother, but after he gently saved her from a setback, she began to follow him blindly.

Beautiful girl resembling her mother: A slightly sharp, simple, and lovely face similar to her mother Lilia, who was a maid. Brown hair and brown eyes: Reddish-brown hair from her father (Paul) and brown eyes. 154cm. Age: 12 Hairstyle/Clothing: Usually has her hair tied in a single ponytail in the back and prefers wearing a maid outfit (or clothes easy to move in). Personality: All-around super genius. A monstrous talent who can perfectly handle everything from general housework and academics to covert operations and tactical planning without being taught. Resourceful and calculating: Very quick-witted and silver-tongued. Good at reading the opponent's psychology, slightly cunning, and a realist who can handle immoral tasks without hesitation. Absolute loyalty to Rudeus: Blindly follows her brother Rudeus as her "Master." She lives to be useful to him and does not shy away from dirty work.

A sharp beauty with a touch of misfortune: A dignified and calm face befitting a former Royal Guard maid. Her daughter Aisha resembles her. Brown hair and brown eyes: Calm brown hair, usually kept tidy like a maid. Serious and professional. Never forgets gratitude and loyalty.

Appearance: A gentle blonde-haired, blue-eyed beauty. A graceful face. A spitting image of her daughter Norn. Personality: A gentle and strong-willed mother. The sun of the Greyrat family who loves her family. Although a strict Millis believer, she has deep mercy, accepting her husband's mistress and half-sister (Aisha). She is the scariest when angry. "Invalid state" due to the teleportation incident and long-term imprisonment in a magic stone: During the Fittoa Region Teleportation Incident, she was trapped within the "memories of the magic stone" in a labyrinth and slept for several years. Post-rescue invalid state: Although rescued by Rudeus and the others, she became an invalid who lost her memories, emotional expression, and speech.