Fafnir (ファヴニール, Favunīru?) is an evil dragon featured in the Nibelungenlied, the Völsunga Saga, and the Der Ring des Nibelungen.



Siegfried slays him and bathes in his blood to obtain a body close to that of a dragon, Armor of Fafnir.




  • Sieg migrating to the Reverse side of the world

Sieg, obtaining Siegfried's heart, is overwhelmed by the dragon blood during the Great Holy Grail War and fights Fafnir in his dreams. It begins to kill him later, but he uses the Holy Grail to accelerate the process and take on Fafnir's form. He, in Fafnir's form, then takes the Grail to the Reverse Side of the World, where there are no humans for it to effect. 

Fate/Grand OrderEdit

Orleans: Wicked Dragon Hundred Years' WarEdit

Fafnir appears as an enemy under the control of Joan Alter in France in Fate/Grand Order, as her strongest dragon. He is finally defeated by Siegfried in the final battle against Joan Alter's forces. 

Fate/Apocrypha: Inheritance of GloryEdit

Sieg, still in the form of Fafnir, is having difficulties keeping control of the Greater Grail, summoning a spiritual body replica of Ritsuka Fujimaru's consciousness from the Shadow Border to aid in the task. As Fafnir he created a terminal of Sieg to properly interact with Ritsuka.