TV-Series
Description
Rudeus Greyrat originated as an unnamed 34-year-old Japanese NEET. Severe high school bullying, involving being stripped, photographed, and mocked as "Pencil Dick," led to two decades of reclusive isolation. Following his parents' deaths, his refusal to attend their funeral resulted in his siblings disowning him. Homeless, he died pushing teenagers from an oncoming truck, then reincarnated as a newborn in a fantasy world, retaining all prior memories. Determined to live without regrets, he embraced his identity as Rudeus Greyrat.

As an infant in the Greyrat household, he displayed extraordinary magical aptitude, secretly practicing spells from books. At age two, he accidentally destroyed a wall using intermediate water magic, revealing his abilities to his parents. They employed the demon mage Roxy Migurdia as his tutor at age three. Roxy taught him magical fundamentals and helped him overcome his fear of the outside world, securing his lifelong reverence. During childhood, he befriended the half-elf Sylphiette, protecting her from bullies and teaching her magic.

At seven, his father Paul sent him to tutor his cousin Eris Boreas Greyrat in the Asura Kingdom. He spent three years instructing Eris in academics, magic, and swordsmanship while advancing his own training under Sword King Ghislaine. On his tenth birthday, a mana calamity called the Teleportation Event scattered people across continents. Rudeus and Eris landed on the Demon Continent, where the entity Hitogami advised Rudeus to ally with Ruijerd Superdia of the feared Superd tribe. They formed the adventuring party Dead End to fund their journey home and restore Ruijerd's reputation. During this period, Rudeus acquired the Foresight Demon Eye from the demon empress Kishirika Kishirisu, granting limited future sight.

Reuniting with Paul in Millis Kingdom at age twelve led to a violent argument estranging Rudeus from his sister Norn. He later rescued his half-sister Aisha and stepmother Lilia from slavers. A confrontation with the dragonkin Orsted at thirteen left Rudeus near death; Eris nursed him back to health, and they became intimate. Misinterpreting Eris's departure note as rejection, Rudeus developed erectile dysfunction and depression. Following Hitogami's advice, he enrolled at Ranoa Magic University at fifteen. There, he reunited with Sylphiette (disguised as "Fitts"), who cured his condition. They married, making Sylphiette his first wife.

Rudeus later joined the search for his mother Zenith, disregarding Hitogami's warnings. During this quest, he reconnected with Roxy Migurdia, who became his second wife after rescuing him from a dungeon. A future version of Rudeus exposed Hitogami's malicious intent, prompting Rudeus to ally with Orsted against this entity. He reconciled with Eris, marrying her as his third wife. Throughout adulthood, he fathered six children: Lucy (with Sylphiette), Lara (with Roxy), Ars (with Eris), Sieghart (with Sylphiette), Lily (with Roxy), and Christina (with Eris). He died of natural causes at seventy-four.

Physically, Rudeus had light brown hair and green eyes at birth, standing approximately 175 cm tall with a muscular build and a mole under his left eye. His eyes became heterochromatic after replacing both with demon eyes—gaining Foresight in his right and Clairvoyance in his left. Temporary hair whitening occurred twice due to extreme mana depletion.

Magically, Rudeus possessed immense mana reserves, surpassing even the legendary Demon God Laplace. He mastered Voiceless Incantation, enabling instant spellcasting without chants, though this excluded healing magic. His scientific knowledge from his previous life allowed unique spell creation, including the unofficially ranked God-class "Nuclear Explosion." Official rankings include Water Emperor; Earth, Wind, Fire, Healing, and Detoxification Saint; and Barrier Intermediate. His combat style blended earth magic like "Stone Cannon" and "Quagmire" with the mana-efficient Saint Dragon Battle Aura taught by Orsted.

His personality evolved from his previous life's arrogance and perversion. While retaining voyeuristic tendencies and fixations on women, particularly breasts, he consciously practiced humility and kindness to avoid past mistakes. He showed reluctance to kill but exhibited extreme aggression when family or friends were threatened. Trauma from betrayal in his first life manifested as deep loyalty to loved ones; events like Paul's death or Roxy's temporary memory loss caused severe physical distress. He valued cleanliness, remodeling his home to include an elaborate bathhouse.

Notable relationships include his three wives: Sylphiette (emotional anchor), Roxy (mentor figure), and Eris (adventuring partner). He maintained complex ties with siblings—protective of Aisha, initially estranged from Norn—and revered his parents despite Paul's infidelities. Among allies, he shared profound bonds with Ruijerd Superdia and Zanoba Shirone, whom he taught dollmaking. His rivalry-turned-alliance with Orsted became pivotal in opposing Hitogami.