Original Name デルフリンガー
Romaji Name Derufuringā
Nicknames Derf
Series Zero no Tsukaima
Age Unknown
Weight Unknown
Height Unknown
Date of Birth Unknown
Blood Type Unknown

Derflinger – The Speaking Sword of “Zero no Tsukaima

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Derflinger, also known as “Derf”, is a talking sword and a prominent character in the anime series “Zero no Tsukaima”. This intelligent sword has a distinct personality that adds depth to the story. Derflinger is portrayed as loyal, witty, and often serves as a source of comic relief. He forms a strong bond with Saito Hiraga, the protagonist, and provides guidance and support throughout their adventures. Derflinger’s sharp and sarcastic remarks, combined with his unwavering loyalty, make him a beloved character among fans of the series.


Derflinger’s origin and background are intertwined with the magical world depicted in “Zero no Tsukaima”. Created by Sasha, the first Gandálfr, Derflinger is an intelligent sword with unique abilities. He becomes Saito’s weapon of choice and accompanies him on his journey. Throughout the series, Derflinger’s past and connection to other magical beings are gradually revealed, adding depth to his character and the overall narrative.


As a sword, Derflinger takes on the appearance of a traditional medieval blade. He has a slim, silver blade with an ornate crossguard and a hilt wrapped in black leather. Derflinger’s design reflects its role as a magical artifact, with intricate engraving and a sense of elegance. In its dormant state, it appears as an ordinary sword, but once awakened, it gains the ability to communicate and display its unique personality.


Derflinger possesses several extraordinary abilities that contribute to his role as a valuable ally to Saito. One notable power is his ability to absorb spells, although more powerful spells, especially those from square-class mages, require more time to fully absorb. This ability allows Saito to cast powerful magic through Derflinger, enhancing his combat capabilities.
In addition, Derflinger is able to temporarily take control of its wielder’s body, giving them increased strength and combat abilities. This possession-like ability showcases his mystical nature and adds an extra layer of suspense and unpredictability to the story.


Derflinger’s origin is deeply intertwined with the magical world and lore of Zero no Tsukaima. Created by Sasha, the first Gandalfr, Derflinger is not merely a sword, but a spirit that resides within Gandalfr. This revelation, discovered later in the series, sheds light on Derflinger’s true nature and his connection to Saito.
As the series progresses, Derflinger’s origin becomes more significant, revealing the extent of his powers and his role in the ongoing conflicts within the magical realm. His origin story serves as a catalyst for character development and plot progression, further enriching the overall narrative of “Zero no Tsukaima”.

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Derflinger – FAQ

Who is Derflinger in “Zero no Tsukaima”?

Derflinger is a magical sword and sentient weapon in the anime and light novel series “Zero no Tsukaima” (also known as “The Familiar of Zero”). It becomes the familiar of the protagonist, Louise Françoise Le Blanc de La Vallière, who is a student at the Tristain Academy of Magic.

What are Derflinger’s abilities?

The Derflinger has several abilities that make it a formidable weapon. It can communicate telepathically with its wielder, offering advice and guidance during battle. It is also capable of transforming into different forms and can enhance the magical powers of its wielder.

How does Louise get the Derflinger?

Louise obtains Derflinger during a summoning ritual at the Tristain Academy of Magic. In the series, each student is required to summon a familiar, and Louise, known for her poor magical skills, accidentally summons Derflinger instead of a creature. Derflinger then becomes her familiar and partner.

What is Derflinger’s personality?

Derflinger has a lively and humorous personality. He often cracks jokes, teases Louise, and enjoys bantering with his owner. Despite its playful nature, it is also a loyal and dependable companion, always ready to assist Louise in battle and offer guidance when needed.

Can Derflinger talk to people other than Louise?

No, the Derflinger can only communicate telepathically with its wielder, Louise. Others cannot hear his voice or interact with him directly. This unique connection between Louise and Derflinger adds a comedic element to the series, as Louise is often seen talking to her weapon, much to the confusion of those around her.

Does Derflinger have any weaknesses?

While the Derflinger is a powerful weapon, it does have its limitations. It requires a skilled and capable wielder to unleash its full potential. Furthermore, like any other weapon, it can be damaged or destroyed in battle if not properly cared for, or if exposed to powerful attacks from other magical weapons.