Rudeus

Biodata

Feature	Details
Name	Rudeus Greyrat
Species/Race	Human
Gender	Male
Affiliation	Greyrat family; Holy Land of Swords; Royal Academy
Occupation/Role	Mage, swordsman, student, and teaching assistant
Status	Alive
First Appearance	Chapter 5

Power Progression

Stage / Realm / Level	Chapter	Notes
Intermediate Magic	7	Could cast Intermediate Magic without incantations, but lacked the Magic Power needed to compress raw Magic Power into Roa's Magic Sword.
Water Saint-level mage	64	Ghislaine identifies him as a Water Saint-level mage at seven years old.
Sun Breathing trainee	242	Memorized the sword forms within half a morning, though his physical condition prevented him from fully executing them.
Sun Breathing user	253, 257	Received Roa's manual and used the technique in a three-move challenge against the Sword God, but hesitation weakened his attacks.
Intermediate Fire Mage	499	Demonstrated significant aptitude for Fire magic despite his struggles with close combat.

Background

Rudeus is a reincarnator who was a NEET in his previous life. Reborn into the Greyrat family as Roa's younger brother, he initially approaches his new life with curiosity but remains burdened by the fear, cowardice, and avoidance habits formed before reincarnation. Roa recognizes him as the protagonist of the original story and resolves to help him avoid a tragic future involving the Human God and other looming threats 5.

As an infant, Rudeus is intimidated by Roa's cold expression, associating it with the bullies from his past life. Roa eventually reassures him that he will protect him, beginning a relationship in which Rudeus alternately fears, admires, and depends on his older brother 6 7.

Rudeus learns magic early and develops silent casting independently, only to discover that Roa's magical ability vastly surpasses his own. Roa's lesson that magic need not be bound by conventional incantations challenges Rudeus's assumptions and stings his pride 7.

Appearance

Rudeus is a blond-haired boy with emerald-green eyes. As he grows older, he is repeatedly described as blond-haired and physically less imposing than Roa 5 240.

• Yellow or blond hair 5 240
• Emerald-green eyes 5
• Smaller and physically weaker than Alice in their childhood sparring sessions 240
• Displays dark circles after losing sleep while traveling with Ghislaine 257

Personality

Rudeus is intelligent and capable, but his confidence is unstable. He often compares himself to Roa, Paul, and stronger swordsmen, leading him to retreat into self-deprecation or rely on others rather than confronting danger directly. Ghislaine specifically identifies his need to develop self-reliance and a purpose in swordsmanship 64 65.

Despite his fearfulness, Rudeus is not without courage. During Alice's abduction, he chooses to help her escape even after discovering that the situation has become genuinely dangerous and despite the Head Butler's betrayal 71. He also responds seriously when Roa reminds him that he may one day need to protect their family himself 105.

Rudeus has a mischievous and occasionally perverted side. He attempts to steal Roa's underwear as a child, secretly enters Roa's room out of curiosity, and later gains influence among male disciples by giving them romantic advice 6 85 268 271.

Abilities & Skills

Magic

Rudeus possesses exceptional magical talent and can cast without incantations.

• Reached Intermediate Magic at a young age 7.
• Identified as a Water Saint-level mage by Ghislaine at age seven 64.
• Uses Earth magic defensively, including barriers used during his escape with Alice 71.
• Casts a Rock Cannonball spell to demonstrate his improved magic 84.
• Later displays an aptitude for Fire magic, reaching the level of an Intermediate Fire Mage 499.
• His magical potential is substantial, but his reaction speed and confidence can fail him in real combat 72.

Swordsmanship

Rudeus trains under Paul, Ghislaine, and Roa, but initially lags behind both Roa and Alice.

• Initially fails to reach Intermediate level in swordsmanship under Ghislaine's evaluation 65.
• Learns the forms of Roa's Sun Breathing quickly, but lacks the physical condition to perform them properly 242.
• Uses an Iai stance and Sun Breathing against the Sword God Gale, but his fear and indecision undermine all three attacks 257.
• Roa's goal for his sword training is survival in close combat rather than mastery equal to a dedicated swordsman 253.

Strategic Thinking

Rudeus can remain practical in dangerous situations when forced to act.

• Creates an Earth barrier and escapes with Alice during the betrayal at the Gerrard mansion 71.
• Uses airflow manipulation to soften his landing while fleeing with Alice 71.
• Attempts to devise a staged “kidnapping” of Alice to influence her behavior, though the plan goes wrong when the Head Butler betrays them 67 71.

Relationships

• Roa Greyrat — Older brother, protector, mentor, and the person Rudeus most often measures himself against. Rudeus regards Roa as a godlike figure after Roa helps him confront his fear of the outside world 7 64 105.
• Sylphiette — Wife. Rudeus wants to remain close to her and is excited to return home to see her 8 249.
• Paul Greyrat — Father. Paul is affectionate toward Rudeus and expects Roa to treat him as a proper younger brother 6.
• Alice — Frequent sparring partner and fellow student. Rudeus helps her escape kidnappers, but she routinely overwhelms him in close combat 71 84 240.
• Ghislaine — Swordsmanship instructor who bluntly challenges Rudeus to find his own fighting spirit and stop relying on his family 64 65.
• Roxy — Magic teacher whose instruction helps develop Rudeus's magical abilities 8 13.
• Gale, the Sword God — Overwhelming opponent who defeats Rudeus in a three-move spar and exposes his lack of confidence 257.
• Norn and Aisha — Younger sisters whom Rudeus reunites with after a long absence 251.

Story Role / Major Arcs

Early Childhood

Rudeus is born into the Greyrat family and quickly realizes that his older brother Roa is another extraordinary reincarnator. His first years are defined by fear of Roa, magical study, and gradual acceptance of Roa's guidance 5 6 7.

Learning Magic

Rudeus trains alongside Roa and Sylphiette under Roxy. Though Roxy recognizes all three children as unusually talented, Rudeus struggles with being consistently overshadowed by Roa 8 13.

Alice's Abduction

Rudeus supports a plan to frighten Alice into respecting magic, but the scheme becomes a real kidnapping after the Head Butler colludes with outside attackers. Rudeus chooses to protect Alice, escapes with her, and is ultimately saved by Roa when bandits corner them 67 71 72.

Swordsmanship Training

Rudeus trains with Ghislaine and Roa while repeatedly confronting his inadequacy in close combat. Roa makes Alice spar him to force improvement, teaches him Sun Breathing, and gives him explicit goals before leaving on a journey 84 242 252 253.

Holy Land of Swords

Rudeus accompanies Roa to the Holy Land of Swords, studies Sun Breathing, and faces the Sword God Gale. His challenge against Gale ends in a decisive defeat, underscoring that he must overcome his fear and hesitation 255 257.

At the Holy Land, Roa directs illiterate junior disciples to seek Rudeus for help with reading and writing. Rudeus later gains an unexpected following among the male disciples by offering romantic advice 261 268 271.

Royal Academy

Rudeus becomes a third-year student and a teaching assistant for the Royal Academy's second-year class. The role reflects his increased patience and responsibility, though his interactions with Eris initially remain tense 341.

Notable Quotes

“I will work hard.” 105

“In short, I can't be without you, Big Brother Roa!” 105

Trivia

• Rudeus initially considers Roa frightening enough to remind him of the people who bullied him in his previous life 6.
• He once tried to steal Roa's underwear and was lectured for it 6.
• Rudeus becomes intensely interested in riding Roa's Red Dragon because he wants to impress Sylphiette 250.
• He has a tendency to “lie flat” rather than compete when someone else is clearly ahead of him, particularly Roa 153.