Rudeus

Biodata

Power Progression

Background

Rudeus was reincarnated into a world of magic as the son of Paul and Zenith Greyrat. By age one, he understood the local language; Lilia taught him to read, allowing him to independently study his new world. Seeing Zenith heal an injury with magic dispelled his initial disbelief in its existence 2 3.

His talent emerged early. Roxy Migurdia became his magic tutor, later declaring him her first graduate and noting his unusual intelligence, effort, maturity, and magical ability 10. Alongside magic training, he studied basic swordsmanship under Paul, though he recognized that his aptitude with a sword lagged behind his magical talent 8 27.

At age seven, Paul sent Rudeus to Roa as Eris Boreas Greyrat's private tutor. Their first meeting became a physical confrontation, but Rudeus subdued her and gradually earned her recognition as both teacher and opponent. He also taught Eris and Ghislaine magic, adapting his methods to their differing temperaments and strengths 17 18 19 23.

Following the Teleportation Incident, Rudeus travelled through the Demon Continent with Eris and Aisha, supporting the group through adventurer commissions. After returning to the Central Continent, he continued adventuring in search of Zenith before becoming affiliated with Magic University 32 40 68.

Appearance

As an adult, Rudeus is described as a handsome man with brownish-golden hair, emerald-green eyes, and a tear mole beneath his left eye. In battle and formal public appearances, he commonly wears a gray-black robe and carries his staff, the Arrogant Water Dragon King 62 92 113.

• Brownish-golden hair 92
• Emerald-green eyes 92
• Tear mole beneath his left eye 92
• Often carries the Arrogant Water Dragon King 113 141
• Wears four differently colored rings on his left hand, originally publicly associated with his four wives 118 181
• Is frequently depicted in monuments and portraits in robes, holding his staff and wearing his rings 217 259 267

Personality

Rudeus is analytical, curious, and highly adaptive. As a child, he approached magic, language, swordsmanship, and social structures as systems to be understood. As Eris's tutor, he shifted his teaching approach after recognizing that conventional lessons would not hold her interest 3 8 19.

His strongest motivation is protecting his family. He has repeatedly prioritized Aisha, Zenith, his wives, and his children over his own safety, including pleading to Orsted for Aisha's life and pursuing dangerous methods to cure Zenith 47 91 104. This devotion can become ruthlessness: threats against Aisha provoked him into threatening an entire district, while his attempts to cure Zenith involved invasive experiments that disturbed even Ruijerd 37 104.

Despite his capacity for cruelty, he is also compassionate toward people outside his family. He heals injured adventurers, treats a poisoned warrior during a sea-monster attack, and spent 67 days helping an unfamiliar comatose woman recover without requesting payment 40 56 118.

Rudeus is also protective and affectionate as a father. He is prone to jealousy when others take his daughters' attention, but he provides for their training, equipment, safety, and future education 135 180 188. In later life, he preferred domestic life, magical research, teaching, and time with his wives and children to ruling or maintaining political power 267.

Abilities & Skills

Chantless Magic

Rudeus can cast without chanting and possesses exceptional magical skill and mana reserves.

• Reached Water Saint rank by age five 68
• Casts powerful Fire Ball magic capable of impressing Eris and Ghislaine 19
• Uses large-scale lightning, ice, earth, wind, water, and fog magic in combat 37 113 164
• Sustained a near-continuous magical barrage against Reida for almost an hour 113
• Created a nation-encompassing magic circle that was believed capable of destroying the King Dragon Kingdom 218 267
• His magical power was regarded as potentially comparable to Demon God Laplace's in magic alone 218 267

Mana Sensing and Battlefield Control

Rudeus can sense movement through magic he has personally cast, allowing him to predict opponents' actions.

• Must first establish a wide-area spell; he cannot use this sensing through magic he did not cast himself 19
• Creates terrain, marshes, forests, fog, earthen walls, and pillars to control enemy movement 164
• Uses sensory-disruption magic to impair swordsmen such as Reida and Badigadi 113 164
• His magic is less effective against the Fighting God Armor, which negates most of his attacks 164
• Can maintain magic through a magic-nullifying array by concentrating and forcing out sufficient mana, though this requires exceptional reserves 190

Gravity Magic

Rudeus developed gravity magic into one of his most significant later combat tools.

• Can apply immense pressure to immobilize or disrupt enemies 108 178
• Used gravity magic alongside aerial movement, ice, lightning, and terrain manipulation against Badigadi 164
• Defeated North God Third after a breakthrough in gravity magic 219
• His gravity manipulation is less precise than the Dragon King Sword Kajakuto's true gravitational control 166

Healing and Detoxification

Rudeus is a capable healer who applies magic to injuries, poison, illness, and coma-like conditions.

• Healed himself and Eris after their initial fight 18
• Used detoxification magic on a poisoned adventurer at sea 40
• Treated wounded adventurers following the Red Dragon hunt 56
• Devoted 67 days of magical treatment to awakening a comatose woman, though she retained memory loss and weakness 118
• Pursued brain-invasion magic research in an attempt to cure Zenith's condition 104

Tactical Planning

Rudeus combines magical versatility with preparation and deception rather than relying on direct confrontation.

• Identified flaws in teleportation circles and uncovered a hidden route during the Zenith rescue operation 77
• Formulated the strategy that allowed Paul's party to defeat a magic-absorbing Hydra and rescue Zenith 77
• Used traps, terrain alteration, sensory magic, and team coordination against Badigadi 164 165
• Planned a protracted magical engagement against Reida rather than expecting an instant victory 113
• Acknowledges his limitation as being “perfect” specifically as a magician, not as an all-purpose combatant 166

Swordsmanship and Physical Combat

Rudeus received sword training from Paul and can fight physically, but does not consider swordsmanship his primary strength.

• Learned basic forms, stamina work, and wooden-sword practice from Paul 7 8
• Lost decisively to Paul in spars when forbidden from using magic 27
• Recognized Eris's superior natural talent and physical speed with the sword 19
• Uses magic to compensate for his weaker close-combat ability 8 19

Dragon Hunting

Rudeus became renowned as a Dragon Slayer through repeated campaigns against dangerous dragons.

• Subjugated an earth dragon that had terrorized a Demon Continent village, preserving the corpse for research 259
• Was credited with personally killing several hundred dragon species, beginning in the 430s of the Armored Dragon Calendar 267
• Became one of the two figures whom Demon Continent folklore claimed evil dragons feared, alongside Orsted 267

Equipment

• Arrogant Water Dragon King — Custom staff presented by the Greyrat family for Rudeus's tenth birthday; lightweight and enhanced for water magic 24.
• Laxus's Bone Ring — A ring given through Orsted that allowed Rudeus to see through Underworld King Bita's illusion 151.
• Magic-circle parchments and traps — Uses prepared circles for travel, detection, containment, and ambushes 11 108 164.
• Four colored rings — Worn on his left hand as symbols of his original four wives 118 181.
• Asura royal medal — A token issued by Ariel that represented the unconditional support of the Asura Kingdom and its people 213.

Relationships

• Paul Greyrat — Father and early sword instructor. Paul sent Rudeus to tutor Eris, later called on him to assist in the search for Zenith, and fought beside him during the Hydra rescue and the battle against Geese's forces 7 17 70 77 164.
• Zenith Greyrat — Mother. Rudeus's effort to find and cure Zenith drives much of his adventuring, research, and alliance with Orsted 2 77 91 104.
• Lilia — Family maid who taught Rudeus to read during his earliest years 3.
• Roxy Migurdia — First magic teacher, respected mentor, family figure, and wife. Rudeus later met Roxy's parents and sought Orsted's aid in curing her mother Rokari 10 76 100 142.
• Sylphiette Greyrat — Childhood friend and student who later became Rudeus's wife 11 25 60.
• Eris Greyrat — Former student, combat partner, and wife. Their relationship began with hostility before developing into loyalty and marriage 18 23 95 107.
• Aisha Greyrat — Younger sister, adventuring companion, trusted ally, and later wife. She became an exceptionally capable combatant under Eris and Orsted's instruction and remained central to Rudeus's family life 40 81 102 166 267 286.
• Norn Greyrat — Younger sister whose safety and self-worth remain important to Rudeus. Norn later became an author whose works helped publicize the Superd Race 68 128 160.
• Ghislaine Dedoldia — Eris's sword instructor and Rudeus's ally; she respects his unusual mana-sensing combat method and later served alongside his faction 17 19 107 164.
• Ruijerd Superdia — Superd warrior and ally. They frequently cooperate despite clashing over Rudeus's experiments and methods; Rudeus later negotiated for the Superd Race's protection and relocation 104 148 164 169.
• Orsted — Initially overwhelmed and injured Rudeus, then became his ally, restored his arm, and promised protection for his family. Rudeus served Orsted's anti-Human-God cause thereafter 47 91 165.
• Ariel Anemoi Asura — Political ally whom Rudeus helped secure as Asura Kingdom's ruler. Ariel publicly granted him and each of his four wives a royal token of unconditional Asuran support 68 113 213.
• Nanahoshi Shizuka — Confidante, magical-research associate, and later wife. She was absent for decades before appearing at his funeral, and later bore Rudeus a son, Shizuya Greyrat 70 151 267 288 359 373.
• Lara Greyrat — Daughter who summoned the Holy Beast, Big White, and whose fate was considered significant by Orsted 135 142.
• Windsor Greyrat — Daughter who inherited both Rudeus's family standing and Eris's sword-training environment; she formed a friendship with visiting Beast Race girls 138 180.
• Shizuya Greyrat — Son born to Rudeus and Nanahoshi 373.

Story Role / Major Arcs

• Early education and Roa — Learns magic under Roxy, trains under Paul, and becomes Eris's tutor at age seven 8 17 68.
• Teleportation Incident and adventuring — Is teleported to the Demon Continent at age ten, travels with Eris and Aisha, registers as an adventurer, and rises from F-rank to A-rank 32 40 68.
• Search for Zenith — Becomes an S-rank adventurer while seeking his missing mother and eventually finds Zenith sealed inside a mana crystal beneath a labyrinth 68 77.
• Orsted alliance — After losing an arm during the rescue journey, Rudeus accepts Orsted's protection and agrees to support his goals in exchange for help saving Zenith and safeguarding his family 81 91.
• Asura succession conflict — Helps Ariel defeat Reida's faction, kills Reida through sustained magic, and publicly pledges loyalty to Ariel 102 113.
• Zenith research — Conducts morally controversial brain-invasion experiments on willing slaves in the hope of curing Zenith, bringing him into conflict with Ruijerd 104.
• Superd and Human-God conflicts — Works to protect the Superd Race, confronts Human-God Apostles, and prepares traps against Badigadi and Geese 148 151 152 164.
• Battle against Geese's forces — Leads Paul, Ruijerd, Ghislaine, and Superd warriors against the Water God, Ogre God, Fighting God Badigadi, and Geese's scheme, relying on traps and prolonged mana expenditure rather than direct strength alone 164 165 166.
• Magic King era — Forces the King Dragon Kingdom to compensate Kikka Kingdom rather than destroying it, earning worldwide recognition as the fourth of the Seven Great Powers 218 267.
• Later dragon-slaying campaigns — Continues accepting dangerous dragon-subjugation commissions and becomes legendary as a Dragon Slayer 259 267.
• Later family life — Continues magical research and raises his children with his wives, including Nanahoshi and their son Shizuya 267 359 373.

Divergent Account

A separate sequence depicts Rudeus pursuing Zenith's cure through increasingly lethal experimentation. He purchases slaves for his research and later conducts experiments on members of several races, causing numerous deaths before successfully curing Zenith after ten years 171 177.

In this account, his actions are exposed, Zenith dies by suicide, and Rudeus becomes consumed by revenge against Orsted. He researches time magic, joins forces with other gods, and is ultimately defeated by Orsted 178.

Orsted identifies this path as a prior timeline in which Rudeus gathered the Sword God, Water God, North God Third, and Badigadi in an unsuccessful attempt to kill him 91.

Legacy

• Credited with transforming magical education and appearing in magic textbooks, monuments, and Magic University records 267.
• Remembered by different groups for magical education, teleportation-circle research, dragon slaying, and opposition to slavery 267.
• Liberated an uncounted number of slaves; later free-citizen families across the Central Continent commonly traced their ancestry to people freed by him 267.
• His dragon-slaying campaigns made “Orsted and Rudeus” a traditional warning in parts of the Demon Continent 267.
• His intervention against the King Dragon Kingdom established his reputation as a magician capable of threatening an entire nation 218 267.
• More than ten thousand people, including rulers, scholars, former slaves, villagers, and Orsted, reportedly attended his funeral 267.

Notable Quotes

“You all hold the same place in my heart.” 79

“King Dragon Kingdom will repay Kikka Kingdom double its losses.” 267

“Next, I will demonstrate the structure behind how magic operates.” 267

Trivia

• Roxy identified Rudeus as her first student to graduate 10.
• He created wooden sculptures of his family and friends, then gave them to their subjects 219.
• Although feared as the Magic King, his later years were reportedly spent mostly researching, teaching, walking with his wives, and playing with his children 267.
• Statues of Rudeus commonly portray him with the Arrogant Water Dragon King, his robe, and his rings, though people who knew him considered many depictions inaccurate 217.
• His daughter Lara wanted to inherit the Arrogant Water Dragon King rather than receive another staff 180.