Eris rendered
I’m only good at swinging the sword every day and making babies with Rudeus.
~ Eris


Eris Greyrat (formerly Eris Boreas Greyrat), is a distant older cousin and turned wife of Rudeus Greyrat. She was of the Boreas Greyrat noble family who Rudeus met when he was hired, despite his age, to become her academics teacher.

She is violent, strong, tomboy and merciless towards anyone who holds negative emotions and or intentions against Rudeus. However, despite the outer aggressiveness, Eris also has a high level of shyness, often hitting Rudeus for touching her suddenly even though she does the same to him. She and Rudeus has a mutual inferiority complex where both would assume the other is more wonderful than themselves, easily leading to misunderstandings.

Originally, she had a tendency to constantly release blood lust, but later controls it after years of training at the Holy Land of Swords. She is named the 'Mad Dog' due to her personality of bearing fangs at anyone for a period of time and is noted to be 'free'. She also has a high libido, often attacking Rudeus but it later toned down with age.

Eris became an apprentice to Sword king Ghyslaine Dedorudia (who was also learning under Rudeus' academic teachings) in her childhood, and was later taken by Sword god Gal Farion as his own disciple. She later on became a Sword king in her own right.

Powers and Stats

Tier: Likely High 6-A

Name: Eris Greyrat (formerly Eris Boreas Greyrat)

Origin: Mushoku Tensei: Isekai Ittara Honki Dasu (Jobless Reincarnation: I Will Seriously Try If I Go To Another World)

Gender: Female

Age: 26 (Vol. 22), Around 70 (The age in which she died a few years before Rudeus at the End of Series)

Classification: Mad Dog, Mad Sword king (was offered to become Sword emperor, but she declined), North saint, Goddess of War (in Rudeus' own religion), Husband (as called by Rudeus)

Powers and Abilities: Superhuman Physical CharacteristicsMaster Swordsman, Limited Durability Negation

Attack Potency: Likely Multi-Continent level (Cut off Orsted's arm, though her weapon weakens touki. Defeated Gal Farion, who at the time, was the Sword God)

Speed: At least Massively Hypersonic+ (Stated by Rudeus to be faster than him. Kept pace with North god Kalman III who pressured Rudeus in Mk.I) Speed of Light attack speed with Longsword of Light

Lifting Strength: Unknown

Striking Strength: Likely Mountain Class

Durability: Possibly Multi-Continent level (Is a physical fighter and can fight people of her level; It is unknown how much of one's durability is negated by her sword though)

Stamina: Superhuman

Range: Extended melee range with a sword

Standard Equipment:

-Phoenix Elegant Dragon Sword: A Dragon Emperor made and gave this sword to the first Sword God. It has the ability to nullify, or weaken (e.g. for strong opponents such as Orsted) Touki, effectively ignoring durability to some degree. Eris received it from Gal Farion, the current Sword God, in volume 16 as a gift for being titled Sword King. It was broken by Badigadi.

-Yubi Ori: Yubi Ori or Prominent is a sword made by Yulian Jalisco, one of the 48 demon swords. Rudeus received it from Orsted and passed it on to Eris in volume 17. It is worth about 100,000 Asura gold coins.

Intelligence: Below average academically; was taught by Rudeus how to read, write and do math basics when they were kids, though she only remembered enough, after everything that happened, to read and write simple (and easily misunderstandable) words.

Combat Genius; learned under the Sword god himself after being impressed by her aggression, speed and skill, worthy of her title, "Mad Dog".

Weaknesses: She is hot-headed, though it is not too detrimental to her fighting style. Still, it may get her to overdo an attack and be forced to suffer for it. She also lacks any sort of range attack beyond throwing her own sword.

Notable Attacks/Techniques:

Longsword of Light: A type of sword attack where the sword is swung so fast that its tip reaches lightspeed.


Notable Victories:

Notable Losses:

Inconclusive Matches:

Start a Discussion Discussions about Eris Greyrat

  • Rin Tohsaka vs. Eris Greyrat

    10 messages
    • @Burning No, because the Small Island level attack is a one-shot nuke and her normal attacks are City level.
    • The pain of having one of your two favorite tsunderes be called not favorite. It brings tears to my eyes. And clearly the best girl is Gnome. ...