Saber's True Name is Siegfried (ジークフリート, Jīkufurīto, the Dragon-Blooded Knight (竜血の騎士, Ryūketsu no Kishi) and the "Dragon Slayer" who defeated the evil dragon Fafnir with the holy sword Balmung in hand. He is a great national hero of Germany that has many different depictions in the various legends attributed to him. His most famous role is his introductory appearance in the German epic poem of the Middle Ages, the "Nibelungenlied", portrayed as its main character. He is a character in a tragedy that had spread throughout Europe concerning dragon slaying and the Rhinegold, and his character became established with the ancient epic "Nibelungenlied". However, Siegfried is actually not the main character of the "Nibelungenlied". The real main character is his wife Kriemhild, and this epic is the tale of the most terrible revenge brought upon by her despair and hatred.

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